C1226 Code: Brake Warning Lamp Output Circuit Short to Ground
🟢 Low severity · drivable
Safe to drive, but the brake warning lamp may not work, so check brake function manually.
What C1226 means
The circuit that drives the brake warning lamp is shorted to ground, so the lamp can't illuminate.
Symptoms
- Brake warning lamp not working
- ABS warning light on
- No driving symptoms
Common causes
- most common: Wiring shorted to ground
- common: Faulty brake warning lamp or bulb
- less common: Corroded connector
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Repair wiring shorted to ground | Mechanic | $50–150 |
| Check the lamp bulb and connector | Yes | $5–20 |
Frequently asked questions
Can I drive with a C1226 code?
Yes. It only affects the brake warning lamp, but check your brakes work normally.
What is the most common cause of C1226?
Wiring shorted to ground in the lamp circuit.
How much does it cost to fix a C1226?
$50–$150 for wiring.
Related codes
C1223
C1223 Code: Brake Warning Lamp Output Circuit Failure
C1224C1224 Code: Brake Warning Lamp Output Circuit Open
C1225C1225 Code: Brake Warning Lamp Output Circuit Short to Battery
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.