Error 30 - Rear left wheel speed sensor


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

Error description 30:

Rear left wheel speed sensor


Error symptoms 30:

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


It is found in cars such as:



Solving the problem 30:



Błąd 30 -