P2096 code help

[Hulkxmode]

I have a 2020 mustang GT and I am getting a P2096 code (Post cat fuel trim system too lean bank 1). I am wanting to replace the O2 but I don’t know which O2s too replace.

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[ice445]

Before you replace anything, ensure there aren't any exhaust leaks.

 

[tdstuart]

Any work been done recently? Engine replaced recently? Im pretty sure Bank 1 is the passenger's side. It says post cat so either the cat is bad, the rear o2 is bad, or there is a leak.

When you are looking at the car the rear o2 is the o2 furthest away from the engine after the catalytic converter (or in the catalytic converter I don't remember).

I would get under the car and look for any leaks. You can see a leak by looking for black liquid stains running from connections. If the 18+ exhaust setup is like the 15-17 I think you will see a connection right after the upper o2 before the catalytic convert. If it was leaking there that would make sense for the code.

 

[ORRadtech]

Is the car stock? What milage?
If it's stock I think emissions components are warranted to like 85k miles by federal law.

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