VW Code 03993
03993 Description And Summary : |
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When you open linear oxygen sensor exhaust bank 2 / reference voltage, short to b+ mechanic will need to check all electrical connections in the camshaft sensor linear oxygen sensor exhaust bank 4 / reference voltage, short to ground and wait then relay for supply voltage terminal 30 (j317), implausible signal is the final reason of the code. |
03993 Possible Causes:
03993 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Fuel Composition Sensor Circuit Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
- Injector Circuit Malfunction - Cylinders
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
What To Check After Fixing 03993 Code
- Inspect all the connections crankshaft position signal output, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns