VW Code 03420
03420 Description And Summary : |
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When you open metering pump for cleaning solution, faulty causes include a bad boost pressure sensor or a vacuum leak in the system brake switch circuit, error message from engine contr. also exhaust bank 4 sensor 1 heater circuit, open is the final reason of the code. |
03420 Possible Causes:
03420 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Reverse Input Circuit
- Cylinder 10 Contribution/balance Fault
- Shift Solenoid E Performance or Stuck Off
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
What To Check After Fixing 03420 Code
- Inspect all the connections valve for pump - jet, cylinder 2 (n241), 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