From Ross-Tech Wiki
17545/P1137/004407 - Fuel Trim: Bank 1 (Add): System too Rich
- Malfunction Indicator Light (MIL) active
- Mass Air Flow (MAF) Sensor faulty
- Fuel Pressure Regulator faulty
- Fuel Injector(s) faulty
- Oxygen Sensor Control faulty
- Evaporative Emission (EVAP) System faulty
- Check Mass Air Flow (MAF) Sensor
- Check Fuel Pressure Regulator
- Check Fuel Injector(s)
- Check Oxygen Sensor Control
- Check Evaporative Emission (EVAP) System
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