17535/P1127/004391 - Fuel Trim; Bank 1 (Mult): System too Rich
From Ross-Tech Wiki
17535/P1127/004391 - Fuel Trim; Bank 1 (Mult): System too Rich
Possible Symptoms
- Malfunction Indicator Light (MIL) active
- Reduced fuel economy and engine performance
Possible Causes
- Cylinder misfires
- Spark Plugs
- Old or worn out plugs
- Incorrect type for engine
- Fuel Injectors
- Leaking
- Dirty, poor spray pattern
- Weak ignition system, coil(s), plug wires
- Fuel Pressure
- Boost leak
- EVAP Purge Valve (N80)
- MAF (G70)
- O2 Sensor(S)