DTC Troubleshooting
DTC Troubleshooting: P055C
DTC P055C:
Rocker Arm Oil Pressure Sensor B Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch to ON (II).
2. Check ROCKER ARM OIL PRESSURE SENSOR B in the DATA LIST with the HDS.
Is there about 0.18 V or less?
YES -
Go to step 3.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at rocker arm oil pressure sensor B and the PCM.
3. Turn the ignition switch to LOCK (0).
4. Disconnect the rocker arm oil pressure sensor B 3P connector.
5. Turn the ignition switch to ON (II).
6. Check ROCKER ARM OIL PRESSURE SENSOR B in the DATA LIST with the HDS.
Is there about 0.18 V or less?
YES -
Go to step 8.
NO -
Go to step 7.
7. Measure the voltage between rocker arm oil pressure sensor B 3P connector terminals No. 1 and No. 3.
Is there about 5 V?
YES -
Go to step 16.
NO -
Go to step 12.
8. Turn the ignition switch to LOCK (0).
9. Jump the SCS line with the HDS.
10. Disconnect PCM connector B (49P).
11. Check for continuity between rocker arm oil pressure sensor B 3P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the PCM (B27) and rocker arm oil pressure sensor B, then go to step 18.
NO -
Go to step 24.
12. Turn the ignition switch to LOCK (0).
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector B (49P).
15. Check for continuity between PCM connector terminal B19 and rocker arm oil pressure sensor B 3P connector terminal No. 1.
Is there continuity?
YES -
Go to step 24.
NO -
Repair an open in the wire between the PCM (B19) and rocker arm oil pressure sensor B, then go to step 18.
16. Turn the ignition switch to LOCK (0).
17. Replace rocker arm oil pressure sensor B Rocker Arm Oil Pressure Sensor B Removal/Installation.
18. Reconnect all connectors.
19. Turn the ignition switch to ON (II).
20. Reset the PCM with the HDS.
21. Do the PCM idle learn procedure PCM Idle Learn Procedure.
22. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P055C indicated?
YES -
Check for poor connections or loose terminals at rocker arm oil pressure sensor B and the PCM, then go to step 1.
NO -
Go to step 23.
23. Monitor the OBD STATUS for DTC P055C in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 22, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at rocker arm oil pressure sensor B and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.
24. Reconnect all connectors.
25. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
26. Start the engine, and let it idle.
27. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P055C indicated?
YES -
Check for poor connections or loose terminals at rocker arm oil pressure sensor B and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 26. If the PCM was substituted, go to step 1.
NO -
Go to step 28.
28. Monitor the OBD STATUS for DTC P055C in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 27, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at rocker arm oil pressure sensor B and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 26. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.