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Home / DTC / P1116 — Mass Or Volume Air Flow Circuit Range Performance Problem Bank 2

P1116 — Mass Or Volume Air Flow Circuit Range Performance Problem Bank 2

Detailed page for trouble code P1116.

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P1116

BMW P — Powertrain

Mass Or Volume Air Flow Circuit Range Performance Problem Bank 2

Brand: BMW
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
Repair manuals

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Code

P1116

BUICK P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: BUICK
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

CADILLAC P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: CADILLAC
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

CHEVROLET P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: CHEVROLET
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
456

Browse 456 CHEVROLET manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

CHEVROLET

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

CHRYSLER P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: CHRYSLER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

CITROEN P — Powertrain

Upstream oxygen sensor auto-adaptive

Brand: CITROEN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

DAEWOO P — Powertrain

BOOSTER PRESSURE SNSR - GND/OPEN

Brand: DAEWOO
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
Repair manuals

Manual library for DAEWOO

75

Browse 75 DAEWOO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

DAEWOO

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

DS P — Powertrain

Upstream oxygen sensor auto-adaptive

Brand: DS
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

FORD P — Powertrain

Engine Coolant Temperature Sensor is Out of Self-Test Range

Brand: FORD
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

GM P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: GM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

GMC P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: GMC
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Send to email
Code

P1116

HUMMER P — Powertrain

ECT Signal Unstable or Intermittent

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
Repair manuals

Manual library for HUMMER

138

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Code

P1116

LAND ROVER P — Powertrain

Engine Coolant Temperature Sensor Out of Range the self-test

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

P1116

LINCOLN P — Powertrain

Engine Coolant Temperature Sensor is Out of Self-Test Range

Brand: LINCOLN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
166

Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LINCOLN

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Code

P1116

MAZDA P — Powertrain

ECT Sensor Circuit Out Of Self Test Range

Brand: MAZDA
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

MERCURY P — Powertrain

Engine Coolant Temperature Sensor is Out of Self-Test Range

Brand: MERCURY
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
296

Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCURY

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Code

P1116

OLDSMOBILE P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: OLDSMOBILE
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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Code

P1116

Other P — Powertrain

Engine Coolant sensor out of range/ECT Sensor Out Of Self Test Range

Brand: Other
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
8,297

The library contains 8,297 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.

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Code

P1116

PEUGEOT P — Powertrain

Upstream oxygen sensor auto-adaptive

Brand: PEUGEOT
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

SATURN P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: SATURN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

SUBARU P — Powertrain

Engine Torque Control Cut Signal Circuit Low Input

Brand: SUBARU
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1116

VOLKSWAGEN P — Powertrain

Oxygen Sensor Heater Circuit Open Bank 1 Sensor 1

Brand: VOLKSWAGEN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

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

  1. Connect a professional scan tool. Record freeze-frame and live MAF data while reproducing the fault conditions.
  2. Visually inspect the intake system from airbox to manifold for leaks, loose clamps, torn boots, or restrictions. Repair as needed.
  3. Inspect the MAF connector and wiring for damage, corrosion, or poor contact. Repair damaged wiring and ensure good grounds.
  4. Clean the MAF sensor only with approved MAF cleaner if contamination is evident. Do not use other cleaners or touch the sensing element.
  5. If cleaning does not restore proper readings, bench-test or substitute a known-good MAF (OEM or correct part) and recheck live data.
  6. Perform a smoke test or pressure decay test to find any subtle intake or boost leaks affecting airflow readings.
  7. Verify reference voltages and heater/bridge circuit signals at the MAF connector per factory specifications. Repair wiring faults.
  8. If wiring and sensor test good and the code persists, check for ECM software updates or possible ECM failure and consult TSBs.
  9. 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

⚠️ Status
Mass or Volume Air Flow Circuit Range/Performance Problem — Bank 2. ECM detected MAF readings outside expected range or inconsistent with engine operating conditions for bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P0101 P0102 P0103 P0104 P1115
298

Browse 298 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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