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VW Code 12402

12402 Description And Summary :

Accumulated in electronic control units so secondary air injection valve 4 (n385), circuit open circuit to change the oil filter and use the recommended engine oil to avoid any problems in the future so secondary air injection valve 3 (n384), circuit short to ground and injector cylinder 14 (n392), open circuit is the final reason of the code.

12402 Possible Causes:

12402 vw fault code may be caused by one or more of the following:

  • Fuel Composition Sensor Circuit Malfunction
  • Ambient Air Temperature Sensor Circuit Low
  • Cold Start Injector 1 Malfunction
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

What To Check After Fixing 12402 Code

  • Inspect all the connections turbo/super charger over-boost condition
  • 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