ABS/TC/AC service light
Thread Starter
7th Gear
Joined: Dec 2021
Posts: 7
Likes: 0
ABS/TC/AC service light
Howdy yall, Im getting a tc and abs light on my c5 along with a service ah/abs/tc message after each drive cycle. Just moved to Memphis where its just below freezing and the lights are just now popping up. Read on another tread they could be correlated but i just dont understand how. Some guy in 2009 said he gets it 8/10 times when its cold and he makes a sharp turn which is pretty much whats happening to me. More or less i would just like to understand WHY its happening. Im getting codes:
C1226 H
B2592 H
C1226 H
B2592 H
Safety Car
Joined: Jan 2019
Posts: 4,308
Likes: 3,455
From: Somewhere, Florida
St. Jude Donor '20-'21-'22-'23-'24
C1226 is excessive wheel speed variation. Meaning your RF wheel was spinning faster than your LF and the system thinks something is wrong. Maybe you're hitting ice or something?
That second code is related to the column lock. What year is your car? If it's a manual, do you have an LMC5 installed? If not, get one.
That second code is related to the column lock. What year is your car? If it's a manual, do you have an LMC5 installed? If not, get one.
Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 594
From: Prescott, Arizona
The wheel speed sensor harness connectors at each wheel are open to splash and the elements and can be subject to corrosion or pin problems as C5 Diag suggests. I would disassemble every wheel connector, clean and dielectric grease, reassemble them first. Report back.
