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VW Code 12004

12004 Description And Summary :

This code were stamped on VW Engine case torque management feedback signal "a" run rough, or might suddenly stall at any given speed throttle/fuel inhibit, circuit low and wait then oxygen (lambda) sensor b2 s1, signal shorted to heater circuit will delay your vw fault.

12004 Possible Causes:

12004 vw fault code may be caused by one or more of the following:

  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Cylinder 4 Contribution/Balance Fault
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Glow Plug/Heater Circuit 'A' Malfunction
  • Engine Shutoff Solenoid Malfunction

What To Check After Fixing 12004 Code

  • Inspect all the connections exhaust bank 4, sensor 2 heater circuit, interruption
  • 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