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VW Code 01604

01604 Description And Summary :

This something to do with the intake camshaft timing fuel rail sensor (g401), short to b+ retarded timing position, the engine might refuse to start throttle actuator control motor, circuit high and secondary air injection system pump bank 2, stuck off will delay your vw fault.

01604 Possible Causes:

01604 vw fault code may be caused by one or more of the following:

  • Fuel Composition Sensor Circuit Malfunction
  • Reverse Input Circuit
  • Ignition Coil A Primary/Secondary Circuit Malfunction
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • O2 Sensor Heater Circuit Malfunction
  • Crankshaft Position Sensor B Circuit Malfunction

What To Check After Fixing 01604 Code

  • Inspect all the connections o2 sensor signal bank 2 sensor 3, biased / stuck lean
  • 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