A/T Model

DTC P1498: Voltage Problem in EGR Valve Position Sensor Circuit - A/T Model

1. Reset the PCM.
2. Start the engine.

Is DTC P1498 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the EGR valve and at the PCM.

3. Turn the ignition switch OFF.
4. Disconnect the EGR valve 6P connector.
5. Turn the ignition switch ON (II).




6. Measure voltage between EGR valve 6P connector terminals No.2 and No.3.

Is there approx. 5 V?

YES - Replace the EGR valve.

NO - Go to step 7.




7. Measure voltage between PCM connector terminals C18 and C28.

Is there approx. 5 V?

YES - Repair open in the wire between the EGR valve and the PCM (C18).

NO - Substitute a known-good PCM and recheck. If the symptom/indication goes away, replace the original PCM.