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P0171 Diagnostic Trouble Code Discussion for December 2021

Fuel System Lean (Bank 1)

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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2005 Pontiac Vibe 1.8L Just the code VIN: 5Y2SL63835
P0171: Fuel Trim System Lean. we have checked for air leaks and all the obvious but when gets to the shop everything is testing good... Any ideas??
December 03, 2021
2005 Jaguar S-Type R 4.2L MIL Lamp on VIN: SAJWA03V85
P0171: Lean bank one. Good Day, I have this Jaguar that is causing us to pull our hair out. lean mixture code. We have smoke tested it several times. found smoke from near the throttle body area. removed and resealed intake and all gaskets related to intake. smoked it and st...
December 06, 2021