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VW Code 03990

03990 Description And Summary :

This something to do with the intake camshaft timing starter does not run, mechanically blocked or mechanical malfunction retarded timing position, the engine might refuse to start o2 sensor negative current control bank 1 sensor 1, circuit high . On the other hand powertrain databus, implausible engine temperature message from inst. is the final reason of the code.

03990 Possible Causes:

03990 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor B Circuit Malfunction
  • Injector Circuit Malfunction - Cylinders
  • Reverse Input Circuit
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Crankshaft Position Sensor A Circuit Low Input

What To Check After Fixing 03990 Code

  • Inspect all the connections planetary overdrive / low range, mechanical malfunction
  • 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