OBD Guide
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C1623

Brake Controlled System Malfunction

C1623 is an OBD-II diagnostic trouble code meaning: Brake Controlled System Malfunction. Common causes: wheel speed sensor malfunction, problems with the wiring harness to the sensors. Estimated repair cost: $33–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • ABS/ESP warning light is on
  • Deterioration in braking performance
  • Disabling Brake Assist Systems
  • Unusual behavior of the brake pedal

Causes

  • Wheel speed sensor malfunction
  • Problems with the wiring harness to the sensors
  • ABS/ESP module malfunction
  • Damage to brake components
  • Low brake fluid level
  • Problems with the ABS valve body

How to Fix

  1. Check the brake fluid level
  2. Diagnose wheel speed sensors
  3. Inspect wiring harnesses for damage
  4. Read fault codes from the ABS module
  5. Check the condition of the brake pads and discs
  6. If necessary, replace faulty components
  7. Reset the error and check the system

Related codes

C1200C1210C1230C1240

FAQ

What does the C1623 code mean?

C1623 is an OBD-II diagnostic trouble code that indicates: Brake Controlled System Malfunction

What causes a C1623 error code?

The most common causes of C1623 include: Wheel speed sensor malfunction; Problems with the wiring harness to the sensors; ABS/ESP module malfunction; Damage to brake components.

How do I fix a C1623 diagnostic trouble code?

To fix C1623: Check the brake fluid level. Diagnose wheel speed sensors. Inspect wiring harnesses for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1623?

Limited driving only, diagnose soon

How much does it cost to fix C1623?

The estimated repair cost for C1623 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat