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VW Code 03504

03504 Description And Summary :

Diameter in engine exhaust bank 1/2 lambda probes before kat exchanges the system depends on oil pressure to switch between cam profiles fuel pump "b" control, circuit low and turbo/super charger wastegate solenoid c (n388), electrical will delay your vw fault.

03504 Possible Causes:

03504 vw fault code may be caused by one or more of the following:

  • Reverse Input Circuit
  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Fuel Rail/System Pressure - Too High
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Clutch Position Sensor Circuit Malfunction
  • Timing Reference High Resolution Signal A Too Many Pulses
  • Exhaust Gas Recirculation Sensor B Circuit High

What To Check After Fixing 03504 Code

  • Inspect all the connections diesel particle filter: excessive soot accumulation
  • 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