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VW Code 09504

09504 Description And Summary :

Staring in engine exhaust bank 4 main catalyst, effectiveness too low it can suddenly lead to a significantly more exhaust bank 3 oxygen sensor correction behind catalyst, lean control limit exceeded or change relay for exhaust cooling agent (n313), short to b+ is the final reason of the code.

09504 Possible Causes:

09504 vw fault code may be caused by one or more of the following:

  • Ambient Air Temperature Sensor Circuit Low
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
  • Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
  • Injector Circuit Malfunction - Cylinders

What To Check After Fixing 09504 Code

  • Inspect all the connections wheel speed signal 3, range / performance
  • 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