C1225: Lamp Brake Warning Output Circuit Short To Battery
MediumChassisAnti-Lock Brakes
What does C1225 mean?
C1225 is a diagnostic trouble code indicating "Lamp Brake Warning Output Circuit Short To Battery". The ECU is detecting a voltage reading that is below the expected range in the anti-lock brakes circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- ABS warning light on
- Brake pedal feels different
- Unusual braking behaviour
- Intermittent warning lights
Estimated repair cost
Typical range in Australia (parts + labour)
$200 – $1000 AUD
Common causes
- Damaged or corroded wiring harness
- Loose or disconnected electrical connector
- Failed anti-lock brakes sensor or actuator
- Blown fuse in the related circuit
- Poor ground connection
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
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Code C1225 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.