Error C121D - ABS pump braking pressure sensor error


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 C121D this means that the driver ABS pump is probably damaged.

Error description C121D:

ABS pump braking pressure sensor error


Error symptoms C121D:

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


It is found in cars such as:

  • ATE MK60 - Mitsubishi Grandis, Outlander, Galant


Solving the problem C121D:



Błąd C121D -