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DTC Troubleshooting




DTC Troubleshooting: P055B, P1286, P128A, P128C, P128D, P2646, P3400

DTC P055B:

Rocker Arm Oil Pressure Sensor A Stuck High

DTC P1286:

Rocker Arm Oil Pressure Sensor B Stuck Low

DTC P128A:

Rocker Arm Oil Pressure Sensor B Stuck High

DTC P128C:

Rocker Arm Oil Pressure Sensor A Stuck Low

DTC P128D:

Rocker Arm Oil Pressure Sensor A Stuck High

DTC P2646:

Rocker Arm Oil Control Valve A Stuck ON/OFF

DTC P3400:

Valve Pause System (VPS) Stuck OFF

Special Tools Required

- Pressure Gauge Adapter 07NAJ-P07010A
- A/T Low Pressure Gauge w/Panel 07406-0070301
- A/T Pressure Test Hose 07AAJ-PY4A100
- A/T Pressure Adapter 07MAJ-PY40120
- Oil Pressure Hose 07ZAJ-S5A0200

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

- If DTC P0522, P0523, P055C, and/or P055D is stored at the same time as DTC P055B, P1286, P128A, P128C, P128D, P2646, and/or P3400, troubleshoot DTC P0522, P0523, P055C, and/or P055D first, then recheck for DTC P055B, P1286, P128A, P128C, P128D, P2646, and/or P3400.

1. Check the engine oil level and condition.

Is the engine oil OK?

YES -

Go to step 2.

NO -

Adjust the engine oil level to the proper level or replace it, then go to step 22.

2. Turn the ignition switch to ON (II).

3. Clear the DTC with the HDS.

4. Select the VTEC TEST in the INSPECTION MENU, and do the VTEC TEST with the HDS.

Is the test result 0?

YES -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at rocker arm oil pressure sensor A, rocker arm oil pressure sensor B, rocker arm oil control solenoid A, rocker arm oil control solenoid B, and the PCM.

NO -

- If the result is 1, go to step 8.
- If the result is 2, go to step 14.
- If the result is 3 or 4, go to step 5.
- If the result is 5, go to step 6.
- If the result is 6, go to step 19.
- If the result is 7, replace rocker arm oil pressure sensor B, then go to step 21.
- If the result is 8, replace rocker arm oil pressure sensor A, then go to step 21.

5. Check the engine oil pressure Testing and Inspection.

Is the engine oil pressure OK?

YES -

Go to step 7.

NO -

- If the oil pressure is out of specification, inspect these items:
Oil filter.

- Replace the above items as needed, then go to step 22.

6. Check the engine oil pressure Testing and Inspection.

Is the engine oil pressure OK?

YES -

Go to step 13.

NO -

- If the oil pressure is out of specification, inspect these items:
Oil filter.

- Replace the above items as needed, then go to step 22.

7. Install the engine oil pressure switch Service and Repair.

8. Remove rocker arm oil pressure sensor B Rocker Arm Oil Pressure Sensor B Removal/Installation.

9. Attach the special tools to the rocker arm oil control valve as shown, then attach rocker arm oil pressure sensor B (A) to the pressure gauge adapter (B).

NOTE: Install rocker arm oil pressure sensor B in the reverse order of removal with a new O-ring.






10. Reconnect the rocker arm oil pressure sensor B 3P connector.

11. Select the VTEC TEST in the INSPECTION MENU, and do the VTEC TEST with the HDS.

12. Note the failed item in the VTEC TEST, then measure the oil pressure for the failed item (see table).





Is the oil pressure OK?

YES -

Replace rocker arm oil pressure sensor B Rocker Arm Oil Pressure Sensor B Removal/Installation, then go to step 20.

NO -

Replace the rocker arm oil control valve Service and Repair, then go to step 20.

13. Install the engine oil pressure switch Service and Repair.

14. Remove rocker arm oil pressure sensor A Rocker Arm Oil Pressure Sensor A Removal/Installation.

15. Attach the special tools to the rocker arm oil control valve as shown, then attach rocker arm oil pressure sensor A (A) to the pressure gauge adapter (B).

NOTE: Install rocker arm oil pressure sensor A in the reverse order of removal with a new O-ring.






16. Reconnect rocker arm oil pressure sensor A 3P connector.

17. Select the VTEC TEST in the INSPECTION MENU, and do the VTEC TEST with the HDS.

18. Note the failed item in the VTEC TEST, then measure the oil pressure for the failed item (see table).





Is the oil pressure OK?

YES -

Replace rocker arm oil pressure sensor A Rocker Arm Oil Pressure Sensor A Removal/Installation, then go to step 20.

NO -

Replace the rocker arm oil control valve Service and Repair, then go to step 20.

19. Replace the rocker arm oil control valve Service and Repair.

20. Turn the ignition switch to LOCK (0).

21. Reconnect all connectors.

22. Turn the ignition switch to ON (II).

23. Reset the PCM with the HDS.

24. Do the PCM idle learn procedure PCM Idle Learn Procedure.

25. Select the VTEC TEST in the INSPECTION MENU, and do the VTEC TEST with the HDS.

Is the test result 0?

YES -

Go to step 26.

NO -

Check for poor connections or loose terminals at rocker arm oil pressure sensor A, rocker arm oil pressure sensor B, rocker arm oil control solenoid A, rocker arm oil control solenoid B, and the PCM, then go to step 1.

26. Check for Pending or Confirmed DTCs with the HDS.

Are any Pending or Confirmed DTCs indicated?

YES -

Go to the indicated DTC's troubleshooting.

NO -

Troubleshooting is complete.

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