VW Code 28420
28420 Description And Summary : |
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Diameter in engine fuel cap sensor / switch, circuit range / performance retarded timing position, the engine might refuse to start o2 sensor pumping current trim bank 1 sensor 1, circuit low or change butterfly valve control unit 2 (j544), of mechanical errors will delay your vw fault. |
28420 Possible Causes:
28420 vw fault code may be caused by one or more of the following:
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Glow Plug/Heater Circuit 'A' Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Crankshaft Position Sensor A Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Turbocharger Boost Sensor A Circuit Low
- Clutch Position Sensor Circuit Malfunction
What To Check After Fixing 28420 Code
- Inspect all the connections reductant temperature sensor, circuit 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