VW Code 04021
04021 Description And Summary : |
|---|
Accumulated in electronic control units so transmission control unit (j217), programming error to change the oil filter and use the recommended engine oil to avoid any problems in the future so coolant pump control, circuit low also valve for pump - jet: cylinder 11 (n307), range / performance will delay your vw fault. |
04021 Possible Causes:
04021 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Cylinder 4 Contribution/Balance Fault
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 04021 Code
- Inspect all the connections transmission ratio, implausible
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns