02 Sierra ABS Problem

[Richard67]

Just bought this truck and noticed at low speed ABS activates when I'm almost at a complete stop. Last stop I almost missed my garage and went through wall into my basement. Have 4 ABS codes to go with this feed. Listed in sequence as shown on scanner. C0221, C0222, C0226 and C0225. Wondering which would be highest priority.

[richard wysong]

Clear the codes and take it for a ride watching the speed of each wheel as you stop. The condition is called low speed drop out and is caused by usually 1  of the front abs sensors dropping the speed signal at low speed fooling the ABS computer to thinking a brake is locked up. Very common! The best fix is to replace the hub bearing assembly on the offending wheel(s) They come with new sensors installed for not much more $ than buying just the sensor. Until you can fix it pull the ABS fuse to disable the ABS system

Edited November 22, 2022 by richard wysong