C0591
Brake Booster Motor A Phase U-V-W Current Low
C0591 is an OBD-II diagnostic trouble code meaning: Brake Booster Motor A Phase U-V-W Current Low. Common causes: amplifier motor malfunction, open or shorted wiring harness. Estimated repair cost: $167–333.
Symptoms
- Reduced braking performance
- Sometimes hard brake
- ESC/ABS lamp comes on
Causes
- Amplifier motor malfunction
- Open or shorted wiring harness
- Poor contact in the connector
- Amplifier control unit malfunction
How to Fix
- Diagnostics of the wiring harness for breaks and damage
- Checking connectors and contacts
- Amplifier motor testing
- Replacing faulty components
Related codes
Error C0591 by Vehicle Brand
FAQ
What does the C0591 code mean?
C0591 is an OBD-II diagnostic trouble code that indicates: Brake Booster Motor A Phase U-V-W Current Low
What causes a C0591 error code?
The most common causes of C0591 include: Amplifier motor malfunction; Open or shorted wiring harness; Poor contact in the connector; Amplifier control unit malfunction.
How do I fix a C0591 diagnostic trouble code?
To fix C0591: Diagnostics of the wiring harness for breaks and damage. Checking connectors and contacts. Amplifier motor testing. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0591?
Limited driving only, diagnose soon
How much does it cost to fix C0591?
The estimated repair cost for C0591 is $167–333. Actual cost depends on your vehicle, location, and labor rates.
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