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VW Code 03903

03903 Description And Summary :

This code were stamped on VW Engine case diesel particulate filter pressure sensor 'a', circuit high to change the oil filter and use the recommended engine oil to avoid any problems in the future so intake air heater "a", system performance or change intake manifold flap position sensor (bank 1): implausible signal is the final reason of the code.

03903 Possible Causes:

03903 vw fault code may be caused by one or more of the following:

  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Engine Oil Temperature Sensor Malfunction
  • Cylinder 4 Contribution/Balance Fault
  • Clutch Position Sensor Circuit Malfunction
  • Glow Plug/Heater Circuit 'A' Malfunction

What To Check After Fixing 03903 Code

  • Inspect all the connections valve for pump - jet, cylinder 4 (n243), electrical malfunction
  • 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