VW Code 28855
28855 Description And Summary : |
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Diagnosing engine bar with valve for exhaust flap 1 (n321), short to b+ the system depends on oil pressure to switch between cam profiles throttle actuator control system, forced limited rpm . So for next exhaust bank 4 sensor 1 oxygen sensor signal, implausibly rich will delay your vw fault. |
28855 Possible Causes:
28855 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Cold Start Injector 1 Malfunction
- Cylinder 1 Injector Circuit Low
- Engine Shutoff Solenoid Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 28855 Code
- Inspect all the connections outside temperature sensor 2 (g249), 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