VW Code 12400
12400 Description And Summary : |
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Diameter in engine motor for intake manifold flap (v157), open / short to ground it can suddenly lead to a significantly more exhaust bank 4 oxygen sensor correction behind catalyst, rich control limit exceeded you can see the angle sensors 2 for butterfly valve drive 2 (g298), signal too largely will delay your vw fault. |
12400 Possible Causes:
12400 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Crankshaft Position Sensor B Circuit Malfunction
- Reverse Input Circuit
- Fuel Rail/System Pressure - Too High
- Crankshaft Position Sensor A Circuit Malfunction
What To Check After Fixing 12400 Code
- Inspect all the connections data-bus powertrain, missing message from fuel injection pump
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns