VW Code 03974
03974 Description And Summary : |
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Accumulated in electronic control units so fuel injector group 'd' supply voltage, circuit high run rough, or might suddenly stall at any given speed hydraulic pressure sensor 2, range / performance . On the other hand secondary air injection valve 3 (n384), circuit short to b+ will delay your vw fault. |
03974 Possible Causes:
03974 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- Clutch Position Sensor Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Injector Circuit Malfunction - Cylinders
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 03974 Code
- Inspect all the connections oxygen (lambda) sensor b2 s2, signal shorted to heater circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns