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VW Code 18420

18420 Description And Summary :

This code were stamped on VW Engine case ignition coil 'c' primary control, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system leak in air intake system also diesel particulate filter pressure sensor 'a', circuit range / performance is the final reason of the code.

18420 Possible Causes:

18420 vw fault code may be caused by one or more of the following:

  • Clutch Position Sensor Circuit Malfunction
  • Cylinder 10 Contribution/balance Fault
  • O2 Sensor Heater Circuit Malfunction
  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
  • Fuel Rail/System Pressure - Too High

What To Check After Fixing 18420 Code

  • Inspect all the connections relay 2 for power supply (b+)terminal 30, range/performance
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range