C2521 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C2521 – Vehicle Speed Is Abnormal
C2521 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Tire Pressure Monitor System (TPMS) Warning Light ON
C2521 Possible Causes
Faulty Tire Pressure Monitor System (TPMS) Control Module,TPMS Control Module harness is open or shorted,TPMS Control Module circuit poor electrical connection
Vehicle speed function codes were received from the transmitter, but the vehicle speed signal was not input to the module. The Tire Pressure Monitor System (TPMS) Control Module monitors the vehicle speed. The TPMS Control Module sets the OBDII code when the vehicle speed signal is not to factory specifications.