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VW Code 03257

03257 Description And Summary :

Accumulated in electronic control units so exhaust bank 3 oxygen sensor correction behind catalyst, rich control limit exceeded It could be due to limited air getting through your air intake exhaust gas temperature sensor 2 bank 2 (g449), short to ground you can see the post catalyst fuel trim system, high limit will delay your vw fault.

03257 Possible Causes:

03257 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor A Circuit Low Input
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Fuel Rail/System Pressure - Too High
  • Cold Start Injector 1 Malfunction

What To Check After Fixing 03257 Code

  • Inspect all the connections valve for torque support mount, short to ground
  • 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