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VW Code 04126

04126 Description And Summary :

Staring in engine kick down switch malfunction retarded timing position, the engine might refuse to start turbocharger (tc)control module 2, faulty or oxygen (lambda) sensor b1 s2, signal shorted to heater circuit is the final reason of the code.

04126 Possible Causes:

04126 vw fault code may be caused by one or more of the following:

  • Exhaust Gas Recirculation Sensor B Circuit High
  • Cold Start Injector 1 Malfunction
  • Ambient Air Temperature Sensor Circuit Low
  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input

What To Check After Fixing 04126 Code

  • Inspect all the connections motor for intake manifold flap (v157), short to b+
  • 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