Mass or Volume Air Flow Circuit Intermittent
Our emissions expert has put together the following information about the P0104 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
- OBD II P0104
Fault Code Definition
The Mass Airflow Sensor (MAF) measures the amount of air entering the engine and the Engine Control Module (ECM) uses the information to determine the proper amount of fuel quantity and ignition timing. The P0104 trouble code is set when the ECM detects an intermittent voltage output from the MAF Sensor.
Symptoms
- Check Engine Light will illuminate
- In many cases, no abnormal symptoms may be noticed
- In some cases, the vehicle may get poor fuel mileage
Common Problems That Trigger the P0104 Code
- The MAF Sensor is unplugged or the wiring is damaged
- Loose or corroded electrical terminals in the MAF Sensor circuit
- Faulty MAF Sensor
Common Misdiagnoses
- MAF Sensor Replaced when the wiring is bad
- Torn Intake Boot or vacuum leak is the real problem