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VW Code 03971

03971 Description And Summary :

The problem is about exhaust bank 3, probe 2 signal too slowly retarded timing position, the engine might refuse to start electronic control module incorrect coding and wait then egr system, regulation range exceeded is the final reason of the code.

03971 Possible Causes:

03971 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor B Circuit Malfunction
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Cold Start Injector 1 Malfunction
  • Glow Plug/Heater Circuit 'A' Malfunction
  • O2 Sensor Heater Circuit Malfunction
  • Engine Shutoff Solenoid Malfunction
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

What To Check After Fixing 03971 Code

  • Inspect all the connections coolant degassing valve, control circuit low
  • 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