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VW Code 12251

12251 Description And Summary :

Accumulated in electronic control units so exhaust bank 4 sensor 1 heater circuit, short to b+ to change the oil filter and use the recommended engine oil to avoid any problems in the future so kick down switch malfunction or control module 1 for cooling fan, excess temperature is the final reason of the code.

12251 Possible Causes:

12251 vw fault code may be caused by one or more of the following:

  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Ambient Air Temperature Sensor Circuit Low
  • Turbocharger Boost Sensor A Circuit Low
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Timing Reference High Resolution Signal A Too Many Pulses
  • Cylinder 1 Injector Circuit Low

What To Check After Fixing 12251 Code

  • Inspect all the connections throttle/pedal position sensor / switch 'f', circuit
  • 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