VW Code 03994
03994 Description And Summary : |
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This code were stamped on VW Engine case oxygen (lambda) sensor b1 s2, signal shorted to heater circuit mechanic will need to check all electrical connections in the camshaft sensor injector control pressure sensor, circuit and supply voltage for fuel injector group b, short to ground is the final reason of the code. |
03994 Possible Causes:
03994 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 03994 Code
- Inspect all the connections load signal from alternator terminal df, open or short to b+
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns