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Old Mar 1, 2026 | 08:15 PM
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I have a 2002 C5. My dash is lit up stating that I need to service the traction control, active handling and the ABS. I have gone through the onboard diagnostics. No current codes are showing.I have reset the system. Five minutes after driving the notifications reappear again.I suspect that the ABS module is bad but without any codes I am not sure. Has anyone else experience this?

Chris
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Old Mar 1, 2026 | 10:12 PM
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Have you tried pulling the codes before you shut the engine off?
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Old Mar 1, 2026 | 11:36 PM
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No I haven't tried that. Thanks for the suggestion. I will give it a try tomorrow.
Thanks
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Old Mar 2, 2026 | 08:05 AM
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Pull the codes evan a broken wheel sensor wire will light up the dash
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Old Mar 2, 2026 | 05:06 PM
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I still have no current codes showing. Only history codes. Has anyone else experienced this before?
I have tried resetting the system but it doesn't help.
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Old Mar 2, 2026 | 05:52 PM
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What codes are you getting?
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Old Mar 2, 2026 | 06:22 PM
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28-TCS C1225 H
AO-IDCM B2206 H
AO-IDCM B2282 H
AO-IDCM B2284 H
AO-IDCM B2262 H
AO-IDCM U1064 H
A1-RDCM B2283 H
Ai-RDCM B2285 H
AI-RDCM B2265 H
A1-RDCM. U1064 H


Last edited by Christopher Brown; Mar 2, 2026 at 06:43 PM.
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Old Mar 3, 2026 | 08:01 PM
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Originally Posted by Christopher Brown
28-TCS C1225 H
AO-IDCM B2206 H
AO-IDCM B2282 H
AO-IDCM B2284 H
AO-IDCM B2262 H
AO-IDCM U1064 H
A1-RDCM B2283 H
Ai-RDCM B2285 H
AI-RDCM B2265 H
A1-RDCM. U1064 H
That is a capital "L" for "Left Door Control Module"....not an "I"

The 2200 series codes suggested you lost battery power or disconnected the battery at some point.

Obviously..the C1225 code for the LF wheel sensor is what you want to troubleshoot.
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Old Mar 3, 2026 | 08:04 PM
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Ok Thank You.

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Old Mar 4, 2026 | 11:13 AM
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I thought my EBCM was failing, too. I had the 1225 and 1232 codes. On my car, C5 Diag suspected the connector located by the left front control arm. He unplugged the connector, sprayed a special electrical contact cleaner called Deoxit onto both male and female contacts. Dried them both off, and sprayed a continuity improver called Stabilant 22A. That fixed it! AFAIK, the wheel sensors themselves are pretty bulletproof. Connectors are usually the problem. Best of luck to you......
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Old Mar 10, 2026 | 10:39 PM
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Update:
Thanks everyone for the feedback. It turns out that the wiring harness for the
left front wheel sensor was badly chaffing on metal. New harness on order.
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Old Mar 11, 2026 | 10:00 AM
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Care to elaborate exactly where the wire was chafed? If it's the part of the harness that makes all the tight bends on the bearing/sensor itself, I'm not surprised. Several very tight bends in that assembly.....
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Old Mar 11, 2026 | 10:03 AM
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Doubled......
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Old Mar 11, 2026 | 10:11 AM
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Originally Posted by Christopher Brown
Update:
Thanks everyone for the feedback. It turns out that the wiring harness for the
left front wheel sensor was badly chaffing on metal. New harness on order.
Good find
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