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VW Code 28621

28621 Description And Summary :

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

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range