C1225 Code: Brake Warning Lamp Output Circuit Short to Battery
🟢 Low severity · drivable
Safe to drive, but the brake warning lamp may stay on, so check brake function manually.
What C1225 means
The circuit that drives the brake warning lamp is shorted to battery voltage, so the lamp may stay on or behave erratically.
Symptoms
- Brake warning lamp stuck on
- ABS warning light on
- No driving symptoms
Common causes
- most common: Wiring shorted to battery voltage
- common: Faulty brake warning lamp circuit
- less common: Faulty ABS/brake control module
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Repair wiring shorted to battery | Mechanic | $50–150 |
| Check the lamp and connector | Yes | $5–20 |
Frequently asked questions
Can I drive with a C1225 code?
Yes. It only affects the brake warning lamp, but check your brakes work normally.
What is the most common cause of C1225?
Wiring shorted to battery voltage in the lamp circuit.
How much does it cost to fix a C1225?
$50–$150 for wiring.
Related codes
C1223
C1223 Code: Brake Warning Lamp Output Circuit Failure
C1224C1224 Code: Brake Warning Lamp Output Circuit Open
C1226C1226 Code: Brake Warning Lamp Output Circuit Short to Ground
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.