Error C1121 - Power supply to the ABS pump solenoid valves


Reading error codes in a car is a crucial step in diagnosing problems with various vehicle systems, such as the engine, braking system, steering system, and other electronic systems.

Reading error codes with a diagnostic scanner. This is an electronic device that connects to the OBD-II (On-Board Diagnostics II) connector, usually located under the dashboard. Once connected, the scanner can read error codes recorded by various vehicle control modules. These codes are usually numbers that indicate specific problems or malfunctions in individual systems.

If you connected a diagnostic computer and received an error code C1121 this means that the driver ABS pump is probably damaged.

Error description C1121:

Power supply to the ABS pump solenoid valves


Error symptoms C1121:

  • ABS/ESP/BAS/DSC lights are on
  • No communication
  • Creates interference, short circuit


It is found in cars such as:



Solving the problem C1121:



Błąd C1121 -