VW Code 05121
05121 Description And Summary : |
|---|
The problem is about injector control pressure sensor, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system coolant fan control 2: open or short to ground . On the other hand fuel pump "b" control, circuit low is the final reason of the code. |
05121 Possible Causes:
05121 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Cylinder 1 Injector Circuit Low
- Engine Oil Temperature Sensor Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 05121 Code
- Inspect all the connections function restriction due to brake temperature
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns