P1116
Mass Or Volume Air Flow Circuit Range Performance Problem Bank 2
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
Upstream oxygen sensor auto-adaptive
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
BOOSTER PRESSURE SNSR - GND/OPEN
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Manual library for DAEWOO
Browse 75 DAEWOO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
DAEWOO
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DAEWOO: 2001
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Leganza
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DAEWOO: 2000
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Leganza
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DAEWOO: 1999
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Lanos
- S, 2D Hatchback, Automatic
- S, 2D Hatchback, Standard
- S, 4D Sedan, Automatic
- S, 4D Sedan, Standard
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- SE, 2D Hatchback, Standard
- SE, 4D Sedan, Automatic
- SE, 4D Sedan, Standard
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- SX, 2D Hatchback, Standard
- SX, 4D Sedan, Automatic
- SX, 4D Sedan, Standard
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Leganza
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Nubira
- CDX, 4D Hatchback, Automatic
- CDX, 4D Hatchback, Standard
- CDX, 4D Sedan, Automatic
- CDX, 4D Sedan, Standard
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- CDX, 4D Wagon, Standard
- SX, 4D Hatchback, Automatic
- SX, 4D Hatchback, Standard
- SX, 4D Sedan, Automatic
- SX, 4D Sedan, Standard
- SX, 4D Wagon, Automatic
- SX, 4D Wagon, Standard
-
P1116
Upstream oxygen sensor auto-adaptive
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
Engine Coolant Temperature Sensor is Out of Self-Test Range
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Manual library for HUMMER
Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HUMMER
-
HUMMER: 2009
-
HUMMER: 2008
-
HUMMER: 2007
-
HUMMER: 2005
-
HUMMER: 2004
-
HUMMER: 2000
-
HUMMER: 1999
-
HUMMER: 1994
-
HUMMER: 1993
P1116
Engine Coolant Temperature Sensor Out of Range the self-test
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Manual library for LAND ROVER
Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LAND ROVER
-
LAND ROVER: 2022
-
Defender
- 90
- 90
- 90 S
- 90 S
- 90 V8
- 90 V8
- 90 V8 Carpathian Edition
- 90 V8 Carpathian Edition
- 90 X
- 90 X
- 90 X-Dynamic HSE
- 90 X-Dynamic HSE
- 90 X-Dynamic S
- 90 X-Dynamic S
- 90 X-Dynamic SE
- 90 X-Dynamic SE
- 110
- 110
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 V8
- 110 V8
- 110 V8 Carpathian Edition
- 110 V8 Carpathian Edition
- 110 X
- 110 X
- 110 X-Dynamic SE
- 110 X-Dynamic SE
- 110 XS Edition
- 110 XS Edition
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- 2022 Range Rover Base
- 2022 Range Rover Base
- First Edition
- First Edition
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SV
- SV
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
-
-
LAND ROVER: 2021
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- Autobiography Fifty Edition
- 2021 Range Rover Base
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- HSE Dynamic
- HSE Dynamic
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HST
- HST
- SE
- SE
- SVR
- SVR
- SVR Carbon Edition
- SVR Carbon Edition
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
-
LAND ROVER: 2020
-
Defender
- 90 First Edition
- 90 First Edition
- 110 First Edition
- 110 First Edition
- 110 HSE
- 110 HSE
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 X
- 110 X
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
-
Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
-
Range Rover
- Autobiography
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE Dynamic
- HSE PHEV
- HSE PHEV
- HST
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
- SVR
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- SVAutobiography Dyn.
- SVAutobiography Dyn.
-
P1116
Engine Coolant Temperature Sensor is Out of Self-Test Range
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Manual library for LINCOLN
Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LINCOLN
-
LINCOLN: 2024
-
LINCOLN: 2023
-
LINCOLN: 2022
-
LINCOLN: 2021
-
LINCOLN: 2020
-
Continental
- Base, AWD
- Base, FWD
- Black Label, 2.7L Eng VIN P · 2.7L Eng VIN P2020: Continental Black Label
- Black Label, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Black Label
- Livery, AWD
- Livery, FWD
- Reserve, 2.7L Eng VIN P, AWD
- Reserve, 2.7L Eng VIN P, FWD
- Reserve, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Reserve
P1116
ECT Sensor Circuit Out Of Self Test Range
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
Engine Coolant Temperature Sensor is Out of Self-Test Range
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Manual library for MERCURY
Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MERCURY
-
MERCURY: 2011
-
MERCURY: 2010
-
Mountaineer
-
MERCURY: 2009
-
Mountaineer
-
MERCURY: 2008
-
Mountaineer
-
MERCURY: 2007
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2006
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2005
-
Grand Marquis
-
Mariner
-
Montego
-
Monterey
-
Mountaineer
-
-
MERCURY: 2004
-
Marauder
-
Monterey
-
Mountaineer
-
MERCURY: 2003
-
Marauder
-
Mountaineer
-
MERCURY: 2002
-
Cougar
-
Mountaineer
-
Sable
-
Villager
-
-
MERCURY: 2001
-
Mountaineer
-
Sable
- GS, 4D Sedan, 3.0 2, 4F50N
- GS, 4D Sedan, 3.0 2, AX4S
- GS, 4D Sedan, 3.0 S
- GS, 4D Sedan, 3.0 U, 4F50N
- GS, 4D Sedan, 3.0 U, AX4S
- GS, 4D Wagon, 3.0 2, 4F50N
- GS, 4D Wagon, 3.0 2, AX4S
- GS, 4D Wagon, 3.0 U, 4F50N
- GS, 4D Wagon, 3.0 U, AX4S
- LS, 4D Sedan, 3.0 2
- LS, 4D Sedan, 3.0 S
- LS, 4D Sedan, 3.0 U, 4F50N
- LS, 4D Sedan, 3.0 U, AX4S
- LS, 4D Wagon, 3.0 S
- LS, 4D Wagon, 3.0 U, 4F50N
- LS, 4D Wagon, 3.0 U, AX4S
-
Villager
-
MERCURY: 2000
-
Cougar
-
Mountaineer
-
Villager
-
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
Engine Coolant sensor out of range/ECT Sensor Out Of Self Test Range
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Brands with available manuals
The library contains 6,125 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
P1116
Upstream oxygen sensor auto-adaptive
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
ECT Signal Unstable Or Intermittent
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
Engine Torque Control Cut Signal Circuit Low Input
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
P1116
Oxygen Sensor Heater Circuit Open Bank 1 Sensor 1
Causes
- Contaminated, damaged or failed mass air flow (MAF) sensor for Bank 2
- Air intake restriction or foreign object in intake tract
- Intake air leaks (vacuum, hoses, intercooler, charge pipe) downstream or upstream of the MAF
- Damaged, corroded or disconnected wiring and connectors to the MAF or associated grounds
- Incorrect or mismatched replacement MAF sensor or aftermarket intake modifications
- Faulty engine control module (ECM) or software/calibration issue
Symptoms
- Check Engine Light (MIL) illuminated
- Erratic idle, rough running or stalling
- Reduced engine power, hesitation or poor throttle response
- Poor fuel economy and/or rich or lean running
- Black exhaust smoke (if running rich)
- Surging or intermittent performance issues under load
What to check
- Read freeze frame and stored data to capture RPM, engine load, coolant temp, intake temp and MAF reading when the code set
- Scan live MAF sensor data (voltage, frequency or g/s) and compare to expected values for RPM/load
- Visually inspect air intake between air filter and intake manifold for leaks, loose clamps, torn boots or obstructions
- Inspect and wiggle MAF wiring harness and connector for corrosion, bent pins, damaged insulation or poor ground
- Check air filter condition and replace if heavily contaminated
- Perform a smoke or pressure test to locate intake leaks
Signal parameters
- Typical MAF output range: ~0.5–4.5 V (varies with sensor design) or sensor-specific frequency signal — consult vehicle specs
- MAF grams/sec (g/s) or lb/min should increase smoothly with RPM; abrupt jumps or flat lines indicate a problem
- At idle a low-flow engine may show small g/s (vehicle-specific) and higher g/s at higher RPM/load — compare to OEM data
- Heater/bridge element current/voltage should be within manufacturer limits (refer to service manual)
- Connector pin voltages: reference voltage (often 5V) and ground must be present at the MAF connector
Diagnostic algorithm
- Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
- Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
- Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
- Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
- If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
- Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
- Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
- If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
- Clear codes and perform a road test under the same conditions to confirm repair. Monitor for reoccurrence and re-check freeze frame if it returns.
Likely causes
- MAF sensor contamination or failure (most common)
- Intake tract leak between MAF and intake manifold
- Damaged wiring or poor connector contact at MAF harness
- Air filter clogged or severe restriction upstream of MAF
- Incorrect MAF calibration or non‑OEM sensor
- ECM fault (least common)
Fault status
Similar codes
Manual library for VOLKSWAGEN
Browse 139 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
VOLKSWAGEN
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VOLKSWAGEN: 2021
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Atlas
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN P, AWD
- SE, 2.0L Eng VIN P, FWD
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2021: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium, 2.0L Eng VIN P · 2.0L Eng VIN P2021: Atlas SEL Premium
- SEL Premium, 3.6L Eng VIN R · 3.6L Eng VIN R2021: Atlas SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
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Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL Premium
- SEL Premium, 3.6L Eng VIN E · 3.6L Eng VIN E2021: Atlas Cross Sport SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
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VOLKSWAGEN: 2020
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Atlas
- S, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas S
- S, 3.6L Eng VIN R · 3.6L Eng VIN R2020: Atlas S
- SE, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SE
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
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Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C, AWD
- SEL, 2.0L Eng VIN C, FWD
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
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Jetta
- GLI Autobahn, Automatic DCT Trans
- GLI Autobahn, Standard Trans
- GLI S, Automatic DCT Trans
- GLI S, Standard Trans
- R-Line, 1.4L Eng VIN 5, Automatic Trans
- R-Line, 1.4L Eng VIN 5, Standard Trans
- R-Line, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta R-Line
- S, 1.4L Eng VIN 5, Automatic Trans
- S, 1.4L Eng VIN 5, Standard Trans
- S, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta S
- SE, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SE
- SE, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SE
- SEL, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL
- SEL, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL
- SEL Premium, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL Premium
- SEL Premium, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL Premium
