C0265 on Cadillac
EBCM Motor Relay Circuit Low When On
C0265 on Cadillac vehicles indicates ebcm motor relay circuit low when on. Au7o has documented this code across 1 Cadillac model — most commonly on Eldorado. C0265 is a manufacturer-specific chassis code (common on GM vehicles) indicating the Electronic Brake Control Module (EBCM) detected a fault in the internal motor relay circuit that powers the ABS pump motor, reading low voltage when the relay should be on. This relay must energize for the ABS, traction control, and stability systems to operate. When this fault is present, the module typically disables ABS and traction/stability control, illuminating the related warning lights. Normal braking still works, but the anti-lock and stability assist functions are offline. Typical repair costs on Cadillac range from $400 to $1,200, depending on the specific model and root cause.
Common Causes of C0265
- •Cracked solder joints / internal failure in the EBCM
- •Failed ABS pump motor relay
- •Damaged or corroded EBCM wiring/connectors
- •Low system voltage or weak battery/charging fault
- •Poor ground at the EBCM
- •Failed ABS pump motor
- •Corrosion or water intrusion in the module connector
C0265 on Cadillac by Model
Cadillac Eldorado(1 issue)
- ABS Modulator and Traction Control System Failure1992-2002
The Teves Mark IV ABS modulator assembly develops internal leaks and electronic failures, disabling ABS and traction control. The modulator is expensive and integrates the hydraulic pump, valves, and electronic controller into one unit. Moisture intrusion into the electrical connector accelerates failure.
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View C0265 across all makes →Frequently Asked Questions
What does C0265 mean on Cadillac?▼
C0265 stands for "EBCM Motor Relay Circuit Low When On." C0265 is a manufacturer-specific chassis code (common on GM vehicles) indicating the Electronic Brake Control Module (EBCM) detected a fault in the internal motor relay circuit that powers the ABS pump motor, reading low voltage when the relay should be on. This relay must energize for the ABS, traction control, and stability systems to operate. When this fault is present, the module typically disables ABS and traction/stability control, illuminating the related warning lights. Normal braking still works, but the anti-lock and stability assist functions are offline. On Cadillac specifically, this code is documented across 1 model.
What causes C0265 on Cadillac vehicles?▼
Common causes on Cadillac: Cracked solder joints / internal failure in the EBCM, Failed ABS pump motor relay, Damaged or corroded EBCM wiring/connectors, Low system voltage or weak battery/charging fault, Poor ground at the EBCM. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0265 on a Cadillac?▼
Repair costs on Cadillac range from $400 to $1,200, depending on the specific model and root cause.
Which Cadillac models have C0265 documented?▼
Au7o has documented C0265 on 1 Cadillac model: Eldorado.