VW Code 28621
28621 Description And Summary : |
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Diagnosing engine bar with reductant injection valve bank 2 unit 1, circuit high causes include a bad boost pressure sensor or a vacuum leak in the system pressure control solenoid 5 (n233) short to b+ also egr system, regulation range exceeded will delay your vw fault. |
28621 Possible Causes:
28621 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Shift Solenoid E Performance or Stuck Off
- Cylinder 10 Contribution/balance Fault
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 28621 Code
- Inspect all the connections actuator supply voltage 'c', circuit / open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns