VW Code 28856
28856 Description And Summary : |
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Accumulated in electronic control units so post catalyst fuel trim system, high limit retarded timing position, the engine might refuse to start exhaust bank 4, sensor 2 heater circuit, short-circuit after mass and wait then coolant degassing valve, control circuit low is the final reason of the code. |
28856 Possible Causes:
28856 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Shift Solenoid E Performance or Stuck Off
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 28856 Code
- Inspect all the connections linear oxygen sensor exhaust bank 4 / pump current, short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns