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

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Code

P1116

BMW P — Powertrain

Mass Or Volume Air Flow Circuit Range Performance Problem Bank 2

Brand: BMW
Views: UK: 30 EN: 72 RU: 58
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

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Code

P1116

BUICK P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: BUICK
Views: UK: 36 EN: 98 RU: 62
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

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Code

P1116

CADILLAC P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: CADILLAC
Views: UK: 32 EN: 77 RU: 62
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

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Code

P1116

CHEVROLET P — Powertrain

ECT Signal Unstable Or Intermittent

Views: UK: 34 EN: 71 RU: 63
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

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Code

P1116

CHRYSLER P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: CHRYSLER
Views: UK: 35 EN: 79 RU: 60
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

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Code

P1116

CITROEN P — Powertrain

Upstream oxygen sensor auto-adaptive

Brand: CITROEN
Views: UK: 9 EN: 63 RU: 24
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

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Code

P1116

DAEWOO P — Powertrain

BOOSTER PRESSURE SNSR - GND/OPEN

Brand: DAEWOO
Views: UK: 12 EN: 45 RU: 25
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

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Code

P1116

DS P — Powertrain

Upstream oxygen sensor auto-adaptive

Brand: DS
Views: UK: 13 EN: 43 RU: 18
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

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Code

P1116

FORD P — Powertrain

Engine Coolant Temperature Sensor is Out of Self-Test Range

Brand: FORD
Views: UK: 35 EN: 149 RU: 66
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

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Code

P1116

GM P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: GM
Views: UK: 36 EN: 73 RU: 65
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

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Code

P1116

GMC P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: GMC
Views: UK: 33 EN: 86 RU: 63
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

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Code

P1116

HUMMER P — Powertrain

ECT Signal Unstable or Intermittent

Brand: HUMMER
Views: UK: 17 EN: 48 RU: 35
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

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

Views: UK: 6 EN: 40 RU: 26
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

320

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Code

P1116

LINCOLN P — Powertrain

Engine Coolant Temperature Sensor is Out of Self-Test Range

Brand: LINCOLN
Views: UK: 29 EN: 89 RU: 63
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

166

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Code

P1116

MAZDA P — Powertrain

ECT Sensor Circuit Out Of Self Test Range

Brand: MAZDA
Views: UK: 34 EN: 91 RU: 71
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

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Code

P1116

MERCURY P — Powertrain

Engine Coolant Temperature Sensor is Out of Self-Test Range

Brand: MERCURY
Views: UK: 37 EN: 98 RU: 87
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

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

Views: UK: 31 EN: 88 RU: 60
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

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Code

P1116

Other P — Powertrain

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

Brand: Other
Views: UK: 37 EN: 121 RU: 73
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

6,125

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Code

P1116

PEUGEOT P — Powertrain

Upstream oxygen sensor auto-adaptive

Brand: PEUGEOT
Views: UK: 14 EN: 40 RU: 21
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

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Code

P1116

SATURN P — Powertrain

ECT Signal Unstable Or Intermittent

Brand: SATURN
Views: UK: 33 EN: 77 RU: 63
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

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Code

P1116

SUBARU P — Powertrain

Engine Torque Control Cut Signal Circuit Low Input

Brand: SUBARU
Views: UK: 35 EN: 80 RU: 59
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

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+100 karma for a short comment :)
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Code

P1116

VOLKSWAGEN P — Powertrain

Oxygen Sensor Heater Circuit Open Bank 1 Sensor 1

Views: UK: 34 EN: 88 RU: 83
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

139

Browse 139 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

VOLKSWAGEN

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