Check engine light keeps turning on?

KSNYDER92

MEMBER
2008 HONDA ODYSSEY
6 CYL
2WD
AUTOMATIC
110,000 MILES

Our check engine light came on and we had to replace the variable valve timing actuator. It was fixed and they reset the check engine light. This morning it came back on, but we realized the gas cap was not on, but we took it to run the code anyway and it came up with the same code. They told us the gas cap probably triggered the check engine light but it's coming up with the same code because there is a 50-to-100-mile drive cycle before that code goes away even though it's fixed. Is this right? Should we drive it for a while, and see? We don't want it to cause more issues if not but the car is driving fine now as well.

3 Replies

STEVE W.

MECHANIC
13,449 POSTS

If you mean the light came back on with the same VVT code and not an EVAP code then no, they are not correct. Do you know the original code? Could you post it here please?
There are really no codes that tell you "replace part X" they instead tell you that the computer sees an error in a system and that testing is needed. It's possible the error is a circuit code which could be a wiring issue or even a failure inside the ECM that is stopping the signal.

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Friday, February 17th, 2023 AT 10:50 AM

KSNYDER92

MEMBER
2 POSTS

These are the codes provided and the part that was replaced.

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Friday, February 17th, 2023 AT 11:49 AM

STEVE W.

MECHANIC
13,449 POSTS

Okay, so I see a P3497, a P0673 and a U0155 along with the ABS issue and the radar error.
For the P3497 VPS Stuck Off Bank 2 I'll attach a chart showing the different items that can trigger that code. Note that it is set when one of the oil pressure switches doesn't change.
It is also a 2-trip code, so the system has to see the same failure twice withing a certain time for it to turn the light on.
The fastest way to test for the problem would be to use a scan tool and use the bi-directional testing to turn on one oil control solenoid and see what the switches do. If you see one turn on and the other, doesn't you know it's a bad switch. Doing the testing without a scan tool would be very difficult as you would need to know when the system was activating the solenoids and then have a way to watch the switch outputs. Not really something you can do without the scan tool to read the data.

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