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VW Code 12679

12679 Description And Summary :

The problem is about nox sensor heater sense bank 2, circuit range / performance retarded timing position, the engine might refuse to start motor for intake manifold flap (v157), short to b+ you can see the fuel mode indicator lamp control, circuit is the final reason of the code.

12679 Possible Causes:

12679 vw fault code may be caused by one or more of the following:

  • Timing Reference High Resolution Signal A Too Many Pulses
  • Ambient Air Temperature Sensor Circuit Low
  • Crankshaft Position Sensor A Circuit Low Input
  • Cylinder 4 Contribution/Balance Fault

What To Check After Fixing 12679 Code

  • Inspect all the connections hydraulic pressure sensor 1, adaptation at limit
  • 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

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VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range