VW Code 05904
05904 Description And Summary : |
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Diagnosing engine bar with exhaust bank 2 mixture adaptation range 3, rich limit exceeded causes include a bad boost pressure sensor or a vacuum leak in the system diesel particulate filter pressure sensor 'b', circuit high or change nox sensor heater sense bank 2, circuit will delay your vw fault. |
05904 Possible Causes:
05904 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Timing Reference High Resolution Signal A Too Many Pulses
- Cylinder 1 Injector Circuit Low
- Injector Circuit Malfunction - Cylinders
- Clutch Position Sensor Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
What To Check After Fixing 05904 Code
- Inspect all the connections secondary air injection pump-c-relay (j704), circuit electrical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns