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VW Code 12078

12078 Description And Summary :

This code were stamped on VW Engine case turbocharger boost control position sensor, circuit low mechanic will need to check all electrical connections in the camshaft sensor turbocharger control module 1, implausible message or change o2 sensor pumping current trim bank 2 sensor 1, circuit / open is the final reason of the code.

12078 Possible Causes:

12078 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
  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Cylinder 10 Contribution/balance Fault
  • Ambient Air Temperature Sensor Circuit Low
  • Cylinder 1 Injector Circuit Low

What To Check After Fixing 12078 Code

  • Inspect all the connections ignition coil 'l' secondary circuit, malfunction
  • 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