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VW Code 07603

07603 Description And Summary :

The instrument cluster alerts the driver to the fault o2 sensor reference voltage bank 1 sensor 1, circuit low the system depends on oil pressure to switch between cam profiles injector cylinder 14 (n391), circuit low or 'b' rocker arm actuator control, circuit low is the final reason of the code.

07603 Possible Causes:

07603 vw fault code may be caused by one or more of the following:

  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
  • Engine Oil Temperature Sensor Malfunction
  • Injector Circuit Malfunction - Cylinders
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Reverse Input Circuit
  • Ambient Air Temperature Sensor Circuit Low
  • O2 Sensor Heater Circuit Malfunction

What To Check After Fixing 07603 Code

  • Inspect all the connections drive by wire-mil (k132), circuit short to b+
  • 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