VW Code 03940
03940 Description And Summary : |
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The instrument cluster alerts the driver to the fault engine coolant temperature sensor 2 (g83), circuit intermittent / erratic It could be due to limited air getting through your air intake please check coding of ecus in data bus powertrain . On the other hand turbo/super charger over-boost condition will delay your vw fault. |
03940 Possible Causes:
03940 vw fault code may be caused by one or more of the following:
- Fuel Temperature Sensor B Circuit Range/Performance
- Crankshaft Position Sensor A Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Glow Plug/Heater Circuit 'A' Malfunction
- Cylinder 1 Injector Circuit Low
- Fuel Rail/System Pressure - Too High
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 03940 Code
- Inspect all the connections activation starter relay 2, open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns