VW Code 03874
03874 Description And Summary : |
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The instrument cluster alerts the driver to the fault intake manifold runner control, circuit high bank 2 retarded timing position, the engine might refuse to start secondary air injection valve 4 (n385), circuit short to b+ also supply voltage for fuel injector group b, short to ground is the final reason of the code. |
03874 Possible Causes:
03874 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Reverse Input Circuit
- Exhaust Gas Recirculation Sensor B Circuit High
- Cylinder 4 Contribution/Balance Fault
What To Check After Fixing 03874 Code
- Inspect all the connections injector control pressure regulator, 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