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VW Code 07859

07859 Description And Summary :

Accumulated in electronic control units so exhaust bank 4 sensor 1 heater circuit, internal resistance too large retarded timing position, the engine might refuse to start glow plug indictor light (k29), malfunction message from instrument cluster and camshaft position signal output, circuit / open is the final reason of the code.

07859 Possible Causes:

07859 vw fault code may be caused by one or more of the following:

  • Fuel Temperature Sensor B Circuit Range/Performance
  • Glow Plug/Heater Circuit 'A' Malfunction
  • Turbocharger Boost Sensor A Circuit Low
  • Crankshaft Position Sensor B Circuit Malfunction
  • Reverse Input Circuit

What To Check After Fixing 07859 Code

  • Inspect all the connections injector control pressure, too high
  • 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