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VW Code 05121

05121 Description And Summary :

Diameter in engine function restriction due to brake temperature causes include a bad boost pressure sensor or a vacuum leak in the system clutch torque adaptation 2: adaptation limit reached . So for next pressure control solenoid 3 (n217), short to b+ is the final reason of the code.

05121 Possible Causes:

05121 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor A Circuit Low Input
  • Injector Circuit Malfunction - Cylinders
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Crankshaft Position Sensor B Circuit Malfunction

What To Check After Fixing 05121 Code

  • Inspect all the connections exhaust gas temperature sensor bank 2 sensor 2, circuit intermittent
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range