Originally Posted by Mrmiata

OBD II Code P0103

Mass or Volume Air Flow Circuit High Input

OBD II Fault Code

• OBD II P0103

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 P0103 trouble code is set when the Powertrain Control Module detects a high 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 P0103 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
• Connector for the Mass Air Meter is defective