P2177 Diagnostic Trouble Code Discussion for September 2026
Fuel System Too Lean At Off Idle (Bank 1)
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| Help Request | Posted | |
| 2012 Audi Q5 Premium Plus 2.0L MIL Lamp on VIN: WA1LFAFP7C P2177: Idle running lean. ==smoke test and no leak at exhaust and intake system. Mass air flow sensor is clean and scope pattern look good. Short fuel trim is zero and long term is 28 percent. Freeze frame occur at 22 mph and fuel pressure 1789 psi. .anyone has this code before. |
September 22, 2026 |
