OBD2 code P0122: Mass air flow / intake pressure sensor
MAF or MAP sensor fault.
Detected Root Component
Throttle Body
Technical Component Diagrams
Throttle Body Layout
Diag Expert technical diagram
Throttle Body Connector
Diag Expert technical diagram
Observed Symptoms
- Engine light on (MIL/Check Engine)
- Rough or unstable slow motion
- Loss of engine power
- Excessive fuel consumption
Possible Causes
- Faulty air flow meter (MAF)
- Faulty MAP sensor
- Vacuum leak
- Damaged wiring
- Corroded connector
Tools Required
Interactive Diagnostic
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Parts likely to be the cause (Thermostat / Refroidissement)
Thermostat / Refroidissement
Photo d'illustration : Thermostat / Refroidissement
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Frequently asked questions about code P0122
What does code P0122 mean? ▾
OBD2 code P0122: Mass air flow / intake pressure sensor. MAF or MAP sensor fault.
What are the symptoms of code P0122? ▾
Code P0122 may cause: Engine light on (MIL/Check Engine), Rough or unstable slow motion, Loss of engine power, Excessive fuel consumption. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code P0122? ▾
The most common causes of code P0122 are: Faulty air flow meter (MAF), Faulty MAP sensor, Vacuum leak, Damaged wiring. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code P0122? ▾
Code P0122 has moderate severity (Warning). Short-term driving remains possible, but a prompt check is recommended to prevent worsening.
How do I fix code P0122? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Faulty air flow meter (MAF), Faulty MAP sensor, Vacuum leak, Damaged wiring. Difficulty: Medium · Estimated time: 30-60min.