What do the trouble codes on GM ABS mean?
What do the trouble codes on GM ABS mean? The ABS light will flash the trouble codes 3 times each and then repeat them. Here is a list of the GM trouble codes, and what they mean. Codes 12 and 14 aren't trouble codes, but may appear to indicate normal operation. 21 - right front speed sensor or circuit open. 22 - missing right front speed signal. 23 - erratic right front speed signal. What is the DTC code for abs-25? ABS-25 ABS (DIAGNOSTICS) LIST OF DIAGNOSTIC TROUBLE CODE (DTC) 21 4A02 Open or short circuit in Front ABS wheel...