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VW Code 12451

12451 Description And Summary :

Staring in engine exhaust bank 4 oxygen sensor correction behind catalyst, rich control limit exceeded mechanic will need to check all electrical connections in the camshaft sensor exhaust pressure regulator vent solenoid, control circuit / open or change activation starter relay 2, open circuit is the final reason of the code.

12451 Possible Causes:

12451 vw fault code may be caused by one or more of the following:

  • Shift Solenoid E Performance or Stuck Off
  • O2 Sensor Heater Circuit Malfunction
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Fuel Composition Sensor Circuit Malfunction

What To Check After Fixing 12451 Code

  • Inspect all the connections coolant degassing valve, control circuit high
  • 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