CEL - P0492 Secondary Air Pump

[Ahsai]

CEL came on one day after dealer changed the engine mounts. Scanner says P0492 - "Secondary Air injection system insufficient flow". I checked the engine compartment and found the dealer forgot to to plug the power back to the air pump. The power wire is dangling! I plugged it back and cleared the code and drove it for 1/2 hr and everything seems to be fine.

Why the CEL didn't come on when I picked up the car from the dealer but rather one day after I picked up the car? Have I likely fixed the problem?

Why the code is not more direct like "Air pump failure"? Any thought?

BTW, the new mounts are great! Much less vibration in idle and the ride is less harsh at the rear. Feels kind of like new rear suspension.

Thanks!

- Ahsai

[RFM]

The secondary air pump works only for a short time and on a cold start, perhaps the engine temperature was still high enough at the pick up. Diagnostic tools can give a sign in which direction the fault occurred, but never a 100% solution.

[Ahsai]

The secondary air pump works only for a short time and on a cold start, perhaps the engine temperature was still high enough at the pick up. Diagnostic tools can give a sign in which direction the fault occurred, but never a 100% solution.

Thanks for the info. That's my understanding too but I forgot to mention the strange part....the CEL came on when I was driving, 30 minutes into traffic with engine fully warmed up. I also heard a slight non-normal sound from the engine and saw the rev dipped instantly right before the CEL was triggered when it happened.

- Ahsai

[RFM]

Drive your car as before and wait till the CEL comes up again and note the code, could be a second problem in the system.

[Ahsai]

Drive your car as before and wait till the CEL comes up again and note the code, could be a second problem in the system.

Thanks. I'll do just that and report back if there are more codes.