DTC P0171 BMW
Fuel System Too Lean (Cylinder Bank 1)
Fuel System Too Lean (Cylinder Bank 1)
Description
Key on or engine running, all electrical components off and coolant temperature at least 80 degrees Celsius; and the DME detected the Bank 1 Adaptive Fuel Control System reached its rich correction limit (a lean A F condition). The fuel status is in a clo
Cause and Solution
Air leaks after the MAF sensor, or leaks in the PCV system
Exhaust leaks before or near where the HO2S is mounted
Fuel injector(s) restricted or not supplying enough fuel
Video Guide
Diagnostic Info
- DTC Code: P0171
- Brand: BMW