P1498
DTC P1498: EGR Valve Position Sensor Circuit High Voltage1. Reset the ECM/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 terminals at the EGR valve and at the ECM/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 about 5 V?
YES - Replace the EGR valve.
NO - Go to step 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).
NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.