## DTC Troubleshooting: P1498 (12-2)

DTC P1498 (12-2): | EGR Valve Position Sensor Circuit High Voltage

1. | Reset the ECM/PCM.

2. | Start the engine. Is DTC P1498 indicated? YES - Go to 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the EGR valve and at the ECM/ PCM.n

3. | Turn the ignition switch OFF.

4. | Disconnect the EGR valve 6P connector.

5. | Turn the ignition switch ON (II).

6. | Measure voltage between the EGR valve 6P connector terminals No. 2 and No. 3. Is there about 5 V? YES - Replace the EGR valve.n NO - Go to 7.

7. | Measure voltage between ECM/PCM connector terminals A10 and A20. Is there about 5 V? YES - Repair open in the wire between the EGR valve and the ECM/PCM (A10).n NO - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/ PCM.n