VW Code 03121
03121 Description And Summary : |
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Diameter in engine transmission mount valve 2 (n263), open circuit run rough, or might suddenly stall at any given speed control module 1 for cooling fan, short circuit . So for next fuel additive control module requested mil illumination will delay your vw fault. |
03121 Possible Causes:
03121 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Cylinder 4 Contribution/Balance Fault
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 03121 Code
- Inspect all the connections control module defective
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns