So my check engine light came on and the error code is P2096. I got a print out from auto zone and the definition is: downstream fuel system 1/2 lean. With probable causes: exhaust leak, engine mechanical fault, 02 sensor fault, or fuel contamination. The counter guy said more than likely it's the 02 sensor but I wanna see what others think before I start replacing parts. Jeep is an 05 with 72,000 miles. Any input would be appreciated. Thanks
I got that when I ran my tank down to below E. I filled the full 19+ gallons. It went away.
What the of exhaust manifold/header do you have?
Could be the O2 but this is one I'd reset fill up an throw some injector cleaner in and see if it comes back. If you change O2's use OEM.
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Do I want: rear; post cat (downstream) or front; post cat (downstream)? And do the NTK sensors work as good as OEM? Cause I know some brands don't work to well in Jeep's.
You would want to replace the front sensor, post cat.
NTK do work as well as OEM. Jeep actually used NGK/NTK from the factory for certain years (parts included sensors and spark plugs). Bosch is what you'd want to stay away from as they don't always get along as well with Jeeps.
I had code P2098 come up last week. same as P2096 but the other post cat sensor.
this is the second time my Jeep has thrown this code. first time was a few thousand miles ago, cleared the code, checked for exhaust leaks, re-tensioned the manifold and header pipes and thought I had nailed it, then it re-appears again last week. maybe replacing the post cat o2 sensor is the cure
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