xjAdam97
NAXJA Forum User
- Location
- Connecticut
There are many threads on different 4x4 forums that say Bosch O2 sensors and the Jeep 4.0 do not play well together. Champion Copper plugs are recommended.
NTK O2 sensors are what Jeep used and so should you.
JEEP P0171 Fuel System 1/1 Lean
Possible Causes
Exhaust manifold leak
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Faulty Mass Air Flow (MAF) sensor
Well I found the issue with the code, and the shitty idle, happened to be the Bosch o2 sensor upstream, replaced it with an NTK and everything ran fine instantly
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