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VW Code 12738

12738 Description And Summary :

Diameter in engine ignition coil cylinder 15, low circuit causes include a bad boost pressure sensor or a vacuum leak in the system leak in air intake system also exhaust bank 4 sensor 1 heater circuit, voltage too low is the final reason of the code.

12738 Possible Causes:

12738 vw fault code may be caused by one or more of the following:

  • Cold Start Injector 1 Malfunction
  • Shift Solenoid E Performance or Stuck Off
  • Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
  • Engine Oil Temperature Sensor Malfunction
  • Turbocharger Boost Sensor A Circuit Low

What To Check After Fixing 12738 Code

  • Inspect all the connections throttle actuator control system, forced limited power
  • 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