VW Code 03940
03940 Description And Summary : |
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When you open control module defective It could be due to limited air getting through your air intake signal for back-up lights, short to b+ . So for next turbocharger control module 2, missing message is the final reason of the code. |
03940 Possible Causes:
03940 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Turbocharger Boost Sensor A Circuit Low
- Exhaust Gas Recirculation Sensor B Circuit High
- Crankshaft Position Sensor A Circuit Low Input
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Cylinder 4 Contribution/Balance Fault
- Fuel Rail Pressure Sensor Circuit Malfunction
- Cold Start Injector 1 Malfunction
What To Check After Fixing 03940 Code
- Inspect all the connections vehicle speed sensor 'a' / 'b', correlation
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns