Presto

The codes below did not turn on the check engine light. No idea why.

Scanned my car for trouble codes and the below ones are the current codes. They are not the previously stored codes.

Any suggestions on how to proceed? Start changing the o2 sensors? Are there more than 2 in total?





its got everything from
P0152
P0174
P2196
P2197
P2198
P2272
P2629
P2A04

rlh23

Any exhaust modifications?

Presto

No mods. Car is stock.

extanker

put a scan tool on it......if those codes were real it would pop a cel

Macster

If the CEL is not active, if the MIL bit is not set (IIRC from my OBD2 days this is the high bit of the byte that contains the # of error codes), the codes are stale.

Absent any untoward engine symptoms my recommendation would be to clear the codes then road test the car. If the CEL comes on then pull the active codes, the freeze frame code and data and any pending codes and go from there.

Presto

I did clear the codes and within about 75 miles of driving they came back. No CEL though.

Petza914

I'd start looking for an intake vacuum leak. With errors both on the lean and rich sides, I'd say you have unmetered air entering the motor or potentially a bad MAF. Clear the codes again, disconnect the MAF and see if it runs the same or worse. If the same, then you probably need a new MAF.

STEVEW3765

I feel your pain brotha. My car is sitting in the garage until the 02 sensors for banks 1 and 2 arrive. You might check to see if the oil filler cap is secure...ask me how I know...please don't.

Presto

no MAF related codes but i will unplug it and see if any new codes come up.

Checked for any intake side or exhaust leaks and everything seems fine

Could damaged catalytic converters cause this? when the honeycomb material inside degrades considering the car is a 2010 with 55k miles?

might be easier to just buy 2 02 sensors for one side and see if the codes go away, if they do then replace the other 2 as well.

Presto

Just to update. I changed all 4 O2 sensors (bosch) and all the error codes have gone away. Had to remove the side mufflers to access the post cat sensor.
Since I got that far changed the spark plugs as well. Used the bosch plugs. Car feels smoother on acceleration now, maybe just a placebo effect.

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docdrs

Thanks for the update, how long since you replaced them?

Presto

Been about 4 days and 200 miles.