logo

VW Code 02478

02478 Description And Summary :

This code were stamped on VW Engine case direct ozone reduction catalyst deterioration sensor, circuit to change the oil filter and use the recommended engine oil to avoid any problems in the future so mil control circuit, open / short to b+ you can see the pressure sensor for brake boost (g294), short to ground is the final reason of the code.

02478 Possible Causes:

02478 vw fault code may be caused by one or more of the following:

  • Ignition Coil A Primary/Secondary Circuit Malfunction
  • Crankshaft Position Sensor A Circuit Low Input
  • Fuel Rail/System Pressure - Too High
  • Cylinder 4 Contribution/Balance Fault
  • Injector Circuit Malfunction - Cylinders

What To Check After Fixing 02478 Code

  • Inspect all the connections torque management feedback signal "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