2002 chevy silverado 2500hd mass air flow sensor problems

This common code is quite rare, and unlike related Error Code P0102, it doesn’t indicate a dirty MAF. Corroded or loose electrical terminals in the MAF sensor circuit.In some cases, however, it causes poor fuel mileage and a general decrease in power.Įrror Code P0103 is usually caused by a wiring short to positive, or trouble in MAFNAF sensor. Aside from that, there are no noticeable symptoms for this code, making it quite tricky. The most common tell-tale symptom of this code is the illumination of the Check Engine light in the dashboard.

Therefore, it is set when the PCM detects the MAF sensor experiencing high voltage output. The purpose of the MAF sensor is to ensure the correct amount of air enters the engine, as the ECM (Engine Control Module) uses this information to control the amount of fuel and ignition timing.Įrror Code P0103 means the MAF has a higher voltage output to the ECU (Engine Control Unit, an electronic control unit that controls the actuators of the internal combustion engine, ensuring optimal engine performance). This error code is often associated with P0100, P0101, P0102 and P0104. Basically, this means there’s a problem with the MAF sensor circuit, as it receives a voltage (air flow) significantly higher than expected. Error Code P0103 is defined as MAF (Mass Air Flow) sensor or VAF (Volume Air Flow) sensor high input.

2002 chevy silverado 2500hd mass air flow sensor problems