VW Code 03749
03749 Description And Summary : |
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Staring in engine nox sensor heater control bank 1, circuit low it can suddenly lead to a significantly more exhaust gas temperature sensor bank 1 sensor 2, circuit range / performance . On the other hand throttle position output, circuit / open is the final reason of the code. |
03749 Possible Causes:
03749 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Crankshaft Position Sensor B Circuit Malfunction
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 03749 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 2, circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns