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P2177 Diagnostic Trouble Code Discussion for September 2012

Fuel System Too Lean At Off Idle (Bank 1)

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Trouble Ticket Help Requests for DTC P2177
Help Request Posted
2004 BMW 745Li 4.4L MIL Lamp on VIN: WBAGN63534
P2177: Multiplicative mixture too lean bank 1. Vehicle came in with CEL, found above codes. Checked fuel pressure, found 2.5BAR, spec 3.5BAR. Replaced fuel pump and filter, fuel pressure improved slightly to 2.8BAR, codes return. Replaced MAF, no change. Substituted known good SBSR from another car without...
September 28, 2012