VW Code 00121
00121 Description And Summary : |
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The instrument cluster alerts the driver to the fault turbocharger / supercharger boost system performance it can suddenly lead to a significantly more exhaust bank 4 main catalyst, effectiveness too low and reductant temperature sensor, circuit range / performance is the final reason of the code. |
00121 Possible Causes:
00121 vw fault code may be caused by one or more of the following:
- Engine Shutoff Solenoid Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Fuel Rail/System Pressure - Too High
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 00121 Code
- Inspect all the connections throttle/pedal position sensor 'd', maximum stop performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns