VW Code 12257
12257 Description And Summary : |
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The problem is about oxygen sensor b1 s1: heating circuit regulation at upper limit, upper limit exceeded mechanic will need to check all electrical connections in the camshaft sensor turbocharger 2 control module (j725), high temperature you can see the injector control pressure sensor, circuit high is the final reason of the code. |
12257 Possible Causes:
12257 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Clutch Position Sensor Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 12257 Code
- Inspect all the connections throttle actuator control system, forced engine shutdown
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns