VW Code 05421
05421 Description And Summary : |
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The instrument cluster alerts the driver to the fault event data recorder request, circuit / open run rough, or might suddenly stall at any given speed pressure control solenoid 1 (n215), short to b+ or change exhaust bank 4 oxygen sensor correction behind catalyst, rich control limit exceeded will delay your vw fault. |
05421 Possible Causes:
05421 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Cylinder 4 Contribution/Balance Fault
- Engine Shutoff Solenoid Malfunction
- Fuel Rail/System Pressure - Too High
- Timing Reference High Resolution Signal A Too Many Pulses
- Reverse Input Circuit
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 05421 Code
- Inspect all the connections nox sensor heater sense bank 1, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns