P0102

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