C0593 – BMW DTC

BMW DTC C0593 – Brake Booster Motor ‘B’ Phase U-V-W Current Low

DTC C0593 meaning on BMW

DTC C0593 on a BMW refers to the Brake Booster Motor ‘B’ Phase U-V-W Current Low fault. This diagnostic trouble code indicates that the current flowing through the U, V, and W phases of the brake booster motor is lower than the expected value. The brake booster motor is a crucial component in the vehicle’s braking system, assisting in the application of brake force.

BMW DTC C0593 symptoms

Symptoms of DTC C0593 on a BMW may include:

• Decreased brake assist
• Increased pedal effort required for braking
• Brake warning light illuminated on the dashboard

BMW DTC C0593 causes

Common causes of DTC C0593 on a BMW include:

• Faulty brake booster motor
• Wiring or connection issues in the brake booster motor circuit
• Defective brake booster motor control module

BMW DTC C0593 seriousness

The seriousness of DTC C0593 on a BMW should not be underestimated, as it directly affects the vehicle’s braking performance. Driving with a malfunctioning brake booster motor can compromise safety by reducing the effectiveness of the braking system. It is crucial to address this issue promptly to ensure proper braking function.

How to diagnose DTC C0593 on BMW

To diagnose DTC C0593 on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s system.
2. Inspect the wiring and connections related to the brake booster motor for any visible damage or corrosion.
3. Test the brake booster motor and its components for proper functionality using a multimeter or oscilloscope.
4. Check the brake booster motor control module for any signs of malfunction.

How to fix DTC C0593 on BMW

To fix DTC C0593 on a BMW, consider the following steps:

1. Replace the faulty brake booster motor if it is determined to be the root cause of the issue.
2. Repair or replace any damaged wiring or connections in the brake booster motor circuit.
3. If the brake booster motor control module is faulty, replace it with a new one.
4. Clear the fault codes using a diagnostic scanner after completing the repairs.

How to erase DTC C0593 on BMW

To erase DTC C0593 on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port.
2. Access the scanner’s menu to clear the fault codes stored in the system.
3. Follow the on-screen instructions to erase the DTC C0593 code.
4. Verify that the fault code has been successfully cleared by rescanning the system.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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