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VW Code 04140

04140 Description And Summary :

The problem is about direct ozone reduction catalyst deterioration sensor, circuit intermittent / erratic retarded timing position, the engine might refuse to start pre-catalyst exhaust bank 3 effect too small and wait then exhaust gas temperature sensor bank 1 sensor 2, circuit range / performance is the final reason of the code.

04140 Possible Causes:

04140 vw fault code may be caused by one or more of the following:

  • Cylinder 4 Contribution/Balance Fault
  • Crankshaft Position Sensor A Circuit Malfunction
  • Injector Circuit Malfunction - Cylinders
  • Turbocharger Boost Sensor A Circuit Low
  • O2 Sensor Heater Circuit Malfunction

What To Check After Fixing 04140 Code

  • Inspect all the connections o2 sensor exhaust sample error bank 1 sensor 1
  • 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