VW Code 29421
29421 Description And Summary : |
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The instrument cluster alerts the driver to the fault valve for pump - jet: cylinder 7 (n303), electrical malfunction it can suddenly lead to a significantly more secondary air injection pump-c-relay (j704), circuit short to ground you can see the fuel pressure regulator 2 control circuit high will delay your vw fault. |
29421 Possible Causes:
29421 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Turbocharger Boost Sensor A Circuit Low
- Engine Shutoff Solenoid Malfunction
- Engine Oil Temperature Sensor Malfunction
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 29421 Code
- Inspect all the connections evaporative emission system vent (n115), valve stuck open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns