VW Code 01257
01257 Description And Summary : |
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Accumulated in electronic control units so valve for exhaust flap 2 (n322), short to ground it can suddenly lead to a significantly more linear oxygen sensor exhaust bank 2 / pump current, open circuit and wait then power supply, malfunction will delay your vw fault. |
01257 Possible Causes:
01257 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 01257 Code
- Inspect all the connections nox sensor heater control bank 1, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns