Indice dei codici guasto · medium
P0102
MAF Sensor circuit low voltage
MAF Sensor circuit low voltage
Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2 · Default action: ECM Default: –Default air mass used –Adaptive fuel metering inhibited –Catalyst warm up ignition retard inhibited –Canister purge inhibited –Maximum engine speed reduced
Common causes
- Blocked air cleaner MAF Sensor to ECM sensing circuit: high resistance
- open circuit
- intermittent short circuit to ground MAF Sensor supply circuit: open circuit
- short circuit to ground MAF Sensor failure
- Mass Airflow Sensor (MAF) unplugged or wiring damaged
- loose terminals in MAF Sensor circuit
- Faulty MAF Sensor
- MAF Sensor unplugged
- wiring damaged
Quick checks
- Confirm freeze-frame and conditions when the code set
- Inspect connectors, grounds, and harness for the circuit named in the code
- Compare live sensor values vs expected (unplugged/biased sensors are common)
Typical fixes
- Reconnect/replace MAF sensor
- check wiring harness