C0581
Brake Booster Motor A Phase U-V-W Circuit High
C0581 is an OBD-II diagnostic trouble code meaning: Brake Booster Motor A Phase U-V-W Circuit High. Common causes: short circuit in the amplifier motor wiring harness, brake booster motor malfunction. Estimated repair cost: $167–444.
Symptoms
- Hard braking
- Increased brake pedal travel
- The brake system fault indicator lights up
- Reduced braking performance
Causes
- Short circuit in the amplifier motor wiring harness
- Brake booster motor malfunction
- Damage to rotor position sensors
- Problems with the brake booster control unit
- Oxidation or corrosion of contacts in the phase circuit
How to Fix
- Check the wiring harness for damage and short circuits.
- Check the resistance of the motor windings
- Diagnose rotor position sensors
- Check the brake booster control unit
- Replace faulty components
Related codes
Error C0581 by Vehicle Brand
FAQ
What does the C0581 code mean?
C0581 is an OBD-II diagnostic trouble code that indicates: Brake Booster Motor A Phase U-V-W Circuit High
What causes a C0581 error code?
The most common causes of C0581 include: Short circuit in the amplifier motor wiring harness; Brake booster motor malfunction; Damage to rotor position sensors; Problems with the brake booster control unit.
How do I fix a C0581 diagnostic trouble code?
To fix C0581: Check the wiring harness for damage and short circuits.. Check the resistance of the motor windings. Diagnose rotor position sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0581?
Limited driving only, diagnose soon
How much does it cost to fix C0581?
The estimated repair cost for C0581 is $167–444. Actual cost depends on your vehicle, location, and labor rates.
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