DTC P0170 Audi
Fuel System Malfunction (Cylinder Bank 1)
Fuel System Malfunction (Cylinder Bank 1)
Description
The engine is running in a closed loop at a stable engine speed, and the ECM detected the lean or rich fuel trim correction valve was more than or less than a calibrated limit.
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
Fuel system not supplying enough fuel during high fuel demand conditions (e. g. , the fuel pump may not supply enough fuel)
Leaking EGR gasket, or leaking EGR valve diaphragm
MAF sensor dirty (causes ECM to underestimate airflow)
Video Guide
Diagnostic Info
- DTC Code: P0170
- Brand: Audi