C1224 Code: Brake Warning Lamp Output Circuit Open
🟢 Low severity · drivable
Safe to drive, but the brake warning lamp may not work, so check brake function manually.
What C1224 means
The circuit that drives the brake warning lamp is open, so the lamp can't illuminate.
Symptoms
- Brake warning lamp not working
- ABS warning light on
- No driving symptoms
Common causes
- most common: Open wiring in the lamp circuit
- common: Faulty brake warning lamp or bulb
- less common: Loose connector
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Check the lamp bulb and replace if burnt out | Yes | $5–20 |
| Repair open lamp wiring | Mechanic | $50–150 |
Frequently asked questions
Can I drive with a C1224 code?
Yes. It only affects the brake warning lamp, but check your brakes work normally.
What is the most common cause of C1224?
Open wiring in the lamp circuit.
How much does it cost to fix a C1224?
$5–$20 for a bulb, or $50–$150 for wiring.
Related codes
C1223
C1223 Code: Brake Warning Lamp Output Circuit Failure
C1225C1225 Code: Brake Warning Lamp Output Circuit Short to Battery
C1226C1226 Code: Brake Warning Lamp Output Circuit Short to Ground
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.