Parking Brake Actuator Over-Temperature
What does C0149 mean?
The C0149 code means the vehicle's onboard diagnostic system has detected: Parking Brake Actuator Over-Temperature. This is a moderate severity code.
Common Symptoms
- Electronic parking brake warning light on
- Parking brake temporarily disabled message
- Burning smell from rear brakes
- Parking brake will not release
- Rear brakes hot to the touch
Probable Causes (Ranked by Likelihood)
- Parking brake actuator overworked from repeated cycling Very High
- Parking brake dragging due to misadjustment High
- Seized parking brake caliper mechanism Moderate
- Faulty temperature sensor in actuator Low
Step-by-Step Diagnostic Procedure
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Allow parking brake system to cool and retest
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Check for dragging rear brakes
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Inspect rear brake calipers for proper release
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Scan parking brake module for temperature DTCs
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Check parking brake cable adjustment
Frequently Asked Questions
Why does the parking brake actuator overheat?
The electric motor in the actuator generates heat during operation. If the brake is repeatedly applied and released in a short time, or if the brake is dragging, the motor can overheat.
Is a dragging parking brake dangerous?
Yes. A dragging brake generates excessive heat that can damage brake pads, rotors, and wheel bearings. It also reduces fuel economy and can cause brake fade.
How long does it take for the actuator to cool?
Typically 15-30 minutes of the vehicle sitting with the engine off is enough for the actuator to cool. The system should return to normal operation once the temperature drops.