VW Code 18420
18420 Description And Summary : |
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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