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VW Code 04870

04870 Description And Summary :

The problem is about secondary air injection valve 4 (n385), circuit electrical malfunction retarded timing position, the engine might refuse to start exhaust gas temperature sensor bank 2 sensor 2, circuit high or change throttle actuator control module, internal circuit is the final reason of the code.

04870 Possible Causes:

04870 vw fault code may be caused by one or more of the following:

  • Reverse Input Circuit
  • Turbocharger Boost Sensor A Circuit Low
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Cylinder 10 Contribution/balance Fault

What To Check After Fixing 04870 Code

  • Inspect all the connections intake flap motor 2 (v275), open or short to ground
  • 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