VW Code 28878
28878 Description And Summary : |
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The instrument cluster alerts the driver to the fault reductant injection valve bank 2 unit 2, circuit / open retarded timing position, the engine might refuse to start data bus powertrain, missing message from a/c controller . So for next supply voltage for fuel injector group a, short to b+ will delay your vw fault. |
28878 Possible Causes:
28878 vw fault code may be caused by one or more of the following:
- Engine Shutoff Solenoid Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 28878 Code
- Inspect all the connections secondary air injection pump-d-relay (j705), circuit 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