OBD-II trouble code
C0265: EBCM Relay Circuit Malfunction
The ABS module detected a fault in the electronic brake control module's motor relay circuit. ABS, traction, and stability control are disabled, but your normal (base) brakes still work.
Quick facts
- System
- Chassis
- Category
- ABS / Hydraulic
- Severity
- High severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $250 – $1,100
- DIY difficulty
- Advanced DIY
What does C0265 mean?
The electronic brake control module (EBCM) uses an internal relay to supply battery voltage to the anti-lock brake pump motor. When the module wants to run the pump during ABS, traction, or stability events, it energizes this motor relay, and it monitors the relay's feedback to confirm it responds. C0265 sets when that relay circuit does not behave as commanded — it won't energize, sticks, or the feedback voltage is out of range.
Without a working motor relay the module cannot power the ABS pump, so it disables ABS, traction control, and stability control and lights the warnings. Your standard hydraulic brakes are unaffected — pressing the pedal still stops the car — but the electronically controlled functions are offline until the fault is fixed.
On most modern vehicles the EBCM relay is integral to the module and is not separately replaceable, so a true relay-circuit failure usually means replacing or rebuilding the EBCM. It is worth noting that C0265 very often appears together with the pump-motor codes C0267 and C0268; when the relay and pump-motor circuits report faults as a group, it strongly suggests a failing EBCM circuit board rather than several independent parts. As always, verify the module has clean power and a solid ground — low voltage or a corroded high-current connection can mimic an internal relay fault — before condemning the module.
Common causes
- Failed internal motor relay within the EBCM
- EBCM internal circuit board failure
- Corroded or loose high-current power or ground connection
- Low battery or system voltage
- Damaged main connector at the hydraulic control unit
- Blown ABS system fuse
Symptoms
- ABS warning light on
- Traction control and stability control (ESC) warning lights on
- ABS, traction, and stability features disabled
- Normal (base) braking still works
- Frequently sets together with pump-motor codes C0267/C0268
Diagnostic steps
- 1.Scan the ABS module and record C0265 and any companion codes (C0267 and C0268 commonly accompany it).
- 2.Load-test the battery and confirm charging-system voltage.
- 3.Perform a voltage-drop test on the EBCM's high-current power feed and ground, and check the ABS system fuse.
- 4.Inspect the main connector at the hydraulic control unit for corrosion, backed-out pins, or moisture.
- 5.Clear the codes and see whether C0265 returns immediately; an instant reset with companion pump-motor codes points to an internal EBCM failure.
- 6.If power, ground, fuse, and connector are all good and the code persists, the EBCM is the likely fault and typically needs replacement or rebuild with programming.
Repair cost
$250 – $1,100
The motor relay is integral to the EBCM and not serviceable on its own, so a confirmed relay-circuit failure usually means EBCM replacement or rebuild plus programming, commonly $400-$1,100 at a shop. Mail-in module rebuild services can lower the parts cost to roughly $150-$300. When the true cause is low voltage or a corroded high-current ground, the repair is much cheaper — rule those out first.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with abs module / ebcm replacement preselected. Adjust labor rate and vehicle category to fit your situation.
Related repairs
DIY vs shop
This is an advanced DIY job. It typically requires specialty tools, scan-tool access, lifting equipment, or careful sequencing to avoid causing new failures. Plan for extended downtime and have a backup vehicle. Most owners are better served by a shop that has done this repair before.