Jeep Engine Code Help, Please


#1

The check engine light on my '05 Wrangler is on (but not flashing). The parts store computer read two errors with a code of p2096. The guy said he doesn’t know the specifics and that I need to go to a dealership. Can anyone tell me what the code stands for and what I could do do narrow down the problem without paying through the nose at the dealership?


#2

I’ve done more research and think that it means “Post Fuel Trim Too Lean”. I understand that it could be the O2 sensor, vacuum leak, pcv or the exhaust manifold. The O2 sensor is common issue and seems simple enough to tackle myself, but I don’t know about the others. I don’t really know how to narrow it down more. Any ideas? Sounds like it might end up being costly.


#3

Check for a air intake leak after the MAF sensor in the intake ducting. You could try spraying some WD-40 on suspected areas while the engine is running. If the engine changes speed you found the leak area.


#4

This problem should be covered under warranty if the mileage is low enough.


#5

not that it really helps; but, the full title of DTC P2096 is, “Post Catalyst Fuel Trim System Too Lean Bank 1”. Your engine is a V6 or a V8. The Bank 1 would be the left side of the engine. The lean part would be excess air, like from a leak on the intake manifold or the exhaust manifold, OR the O2 sensor saying it is. The sensor could be mistaken, or, there could exist a leak.