DTC P0103: MAF Sensor Circuit High Voltage
- Check the ''On Board Diagnostic (OBD) System Check''.
Was the ''OBD System Check'' performed?
YES – Go to step 2.
NO – Go to OBD System Check. 
- Check the DTC.
Are there other DTCs P1618, P1626 or P0113 (beside DTC P0103) being output?
YES – Go to DTC P1618, P1626 or P0113 chart (5 V reference #1 circuit or ground circuit failure).
NO – Go to step 3.
- Start the engine and allow it to idle.
- Check the MAF with the scan tool.
Is about 8 – 13 g/sec indicated? (Sea level of 0 m at room temperature: about 20°C (68°F)).
YES – Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the MAF sensor and at the ECM.
NO – Go to step 5.
- Turn the ignition switch OFF.
- Disconnect the MAF sensor 5P connector.
- Disconnect ECM connector.
- Check the MAF sensor signal and +5 V circuits for a short to ground.
Wire side of female terminals
MAF/IAT sensor 5P connector
JUMPER WIRE
Is a problem found?
YES – Repair the MAF signal or +5 V circuit.
NO – Go to step 9.
- Check the MAF sensor B+ circuit for a short to ground.
Wire side of female terminals
MAF/IAT sensor 5P connector
JUMPER WIRE
Is a problem found?
YES – Repair the MAF B+ circuit.
NO – Go to step 10.
- Connect the ECM connector.