VW Code 12438
12438 Description And Summary : |
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The instrument cluster alerts the driver to the fault ignition coil 'b' secondary circuit, malfunction causes include a bad boost pressure sensor or a vacuum leak in the system intake air heater "a", circuit open and torque management request input signal a, high is the final reason of the code. |
12438 Possible Causes:
12438 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor B Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Cylinder 1 Injector Circuit Low
- Fuel Composition Sensor Circuit Malfunction
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
What To Check After Fixing 12438 Code
- Inspect all the connections coolant circulation pump relay (j151), 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