DTC P1137 Audi
Long Term Fuel Trim Add. Fuel, Bank 1 System Too Rich
Long Term Fuel Trim Add. Fuel, Bank 1 System Too Rich
Description
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinder head, and the oxygen sensor heater for oxygen sensor before the catalytic converter must be properly functioning. The ECM detected the HO2S circuit was too rich, or that it could no longer change Fuel Trim because it was at its lean limit.
Cause and Solution
Air intake system leaking, vacuum hoses leaking or damaged
Air leaks located after the MAF sensor mounting location
EGR valve sticking, EGR diaphragm leaking, or gasket leaking
EVAP vapor recovery system has failed
Excessive fuel pressure, leaking or contaminated fuel injectors
Exhaust leaks before or near the HO2S(s) mounting location
Fuel pressure regulator is leaking or damaged
HO2S circuits wet or oily, corroded, or poor terminal contact
HO2S is damaged or it has failed
HO2S signal circuit open, shorted to ground, shorted to power
Low fuel pressure or vehicle driven until it was out of fuel
Video Guide
Diagnostic Info
- DTC Code: P1137
- Brand: Audi