Code P2647

TOYPACIFIC

MEMBER
2008 HONDA ODYSSEY
6 CYL
2WD
AUTOMATIC
93,000 MILES

I got a code on my van p2647 rocker arm actuator stuck on bank 1.
I had changed the solenoid, gasket with the screen and switch as shown on the photo.
I changed oil and oil filter. Oil level is good where it needs to be. I then turned on the vehicle and drove for a good 2 to 3 hours. No engine light no VSA light. Then the next day both engine, VSA and oil light started blinking again. Oil level is still good. I reset and cleared codes and shut off the engine light. But came back again. Is there something else I can do? Is there another switch I'm suppose to check for bank 1 rocker arm or is the photo on I've attached the correct one?

Thanks in advance.

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4 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good evening,

I attached the possibilities below and th flow chart as well.

What concerns me is the oil light. Your oil pressure may be too low for the system t work. You need to test the actual pressure with the engine at idle and at 3,000 RPM's.

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

Roy

DTC Troubleshooting: P2647

DTC P2647:

VTEC System Stuck ON
(J35A7 engine ('07 model))

Special Tools Required

Pressure Gauge Adapter 07NAJ-P07010A
A/T Low Pressure Gauge w/Panel 07406-0070301
A/T Pressure Hose, 2,210 mm 07MAJ-PY4011A
A/T Pressure Adapter 07MAJ-PY40120
Oil Pressure Hose 07ZAJ-S5AA200

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information See: Computers and Control Systems > Initial Inspection and Diagnostic Overview.

1. Check the engine oil level.

Is the engine oil level okay?

YES -

Go to step 2.

NO -

Adjust the engine oil to the proper level, then go to step 12.

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

3. Clear the DTC with the HDS.

4. Do the VTEC TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES -

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

NO -

Go to step 5.

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

6. Remove the rocker arm oil pressure sensor (A), attach the special tools as shown, then attach the rocker arm oil pressure sensor to the oil pressure gauge adapter (B).

imageOpen In New TabZoom/Print

7. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle for 2 minutes.

8. Check the oil pressure.

Does the oil pressure increase to 392 kPa (4.0 kgf/cm2, 56.9 psi)?

YES -

Replace the rocker arm oil pressure sensor , then go to step 9.

NO -

Replace the rocker arm oil control solenoid , then go to step 9.

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

10. Reconnect all connectors.

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

12. Reset the PCM with the HDS.

13. Do the PCM idle learn procedure See: Engine Control Module > Programming and Relearning > PCM Idle Learn Procedure.

14. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle for 2 minutes.

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

Is DTC P2647 indicated?

YES -

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

NO -

Go to step 16.

16. Monitor the OBD STATUS for DTC P2647 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES -

Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 15, go to the indicated DTC's troubleshooting.

NO -

If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil control solenoid, the rocker arm oil pressure sensor, and the PCM, then go to step 1. If the screen indicates not completed, keep idling until a result comes on.

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