C1251 GMC, CHEVROLET, CADILLAC, BUICK: ROAD SENSING SUSPENSION INDICATES A MALFUNCTION
POST UPDATED IN January, 2023
C1251 GMC, CHEVROLET, CADILLAC, BUICK: ROAD SENSING SUSPENSION INDICATES A MALFUNCTION
The CVRSS (Continuously Variable Road-Sensing Suspension) calculates the normal force and accordingly provides an electrical signal to the EBCM (Electronic Brake Control Module) via two dedicated data lines, being on the right and left. This controller supplies the starting voltage and with this information can detect road conditions where aggressive braking is required if the surface is uneven or rough
When the C1251 OBDII diagnostic code is stored it means that an erratic ABS/TCS operation was detected. This is an information code only.
The reasons for setting the C1251 OBD2 fault code are:
To troubleshoot the DTC C1251 OBDII code you must do the following: