This video will help you diagnose codes P0171, P2187, and P2279 on an Audi A4 with a 2.0T engine. This may be one cause of your issue, but P0171 may refer to many problems. It was a bit easier to diagnose since I could not remove the oil cap while the car was running, narrowing down the issue to a crankcase ventilation problem. I replaced the crankcase vent valve, and the issue was fixed.
It is tough to diagnose a P0171 with a generic scanner since, in my case, when using a dealer-level tool, the codes were utterly different; the stored codes were P2187 - 008583 Bank 1 System too Lean at Idle and P2279 - 008825 Leak in Air Intake System.
#audia4 #P2187 P2279
Негізгі бет Audi A4 2.0T P0171 System Too Lean P2187 P2279
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