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VW Code 12378

12378 Description And Summary :

This something to do with the intake camshaft timing throttle position output, circuit high the system depends on oil pressure to switch between cam profiles data-bus powertrain, missing message from fuel injection pump and please check dtc memory of abs control module is the final reason of the code.

12378 Possible Causes:

12378 vw fault code may be caused by one or more of the following:

  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
  • Ignition Coil A Primary/Secondary Circuit Malfunction
  • Clutch Position Sensor Circuit Malfunction
  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Fuel Rail/System Pressure - Too High

What To Check After Fixing 12378 Code

  • Inspect all the connections low pressure fuel system sensor (g410), 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