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VW Code 01090

01090 Description And Summary :

The problem is about exhaust gas temperature sensor, bank 2 sensor 5, circuit / open retarded timing position, the engine might refuse to start nox sensor heater control bank 2, circuit / open you can see the 'b' rocker arm actuator system, stuck on will delay your vw fault.

01090 Possible Causes:

01090 vw fault code may be caused by one or more of the following:

  • O2 Sensor Heater Circuit Malfunction
  • Engine Oil Temperature Sensor Malfunction
  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
  • Ignition Coil A Primary/Secondary Circuit Malfunction
  • Fuel Composition Sensor Circuit Malfunction
  • Crankshaft Position Sensor A Circuit Malfunction

What To Check After Fixing 01090 Code

  • Inspect all the connections exhaust gas temperature sensor, bank 2 sensor 5, circuit intermittent / erratic
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

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