P2097 CODE

[fishlessam]

My 2014 sierra 5.3l engine light came on with a P2097 code,runs ok, anyone had this code before and what was the fault?No mods just a K&N air filter,thanks all.

[midwestdenaliguy]

It's your oxygen sensor just after the cat converter. Could be a one-time fault that won't come back or you could need a new sensor. Since the truck is driving fine, I'd reset the code and see if it comes back. If you don't have a tool to do that most Autozones will reset it (some don't because they don't want to get blamed for issues - but those locations are rare).

[1SLOW1500]

How many miles and do you have a catch can? Also has dealer "cleaned" the intake?
Your downstream o2 are for cats performance the upstream are more for fuel trim. So after cats is too hot or rich.
Bad 02 are rare back cat more common and if the truck was cleaned the clean kills the cats there are bulletins on it. But dealers do it anyways bc people are close to warranty up and it works. Oil in the intake and heads causes o2 issues but we see that in the upstream more.
If you a somewhat handy you can remove the throttle body and swab the intake to see oil amount. Also remove and inspect the o2.
The truck should switch to different idle and fuel base line.

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[1SLOW1500]

Seafoam the shitttt out of it!

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[midwestdenaliguy]

14 minutes ago, 1SLOW1500 said:

Seafoam the shitttt out of it!

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Lol, another good cleaner is CRC GDI Intake Valve cleaner. It contains PEA which is one of the best cleaning agents for carbon build up/oil.

[fishlessam]

No catch can,around 90000kms.

[BCSilverado]

Just had this happen to mine after a post-cat rich code and replacing the downstream O2 sensors a couple of months ago. Thoughts on next steps? 2015 Silverado