OBD Guide

P0572

Brake Switch A Circuit Low

P0572 is an OBD-II diagnostic trouble code meaning: Brake Switch A Circuit Low. Common causes: faulty brake light switch, open or short circuit in wiring harness. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Cruise control not working
  • Problems starting the engine (on some models)
  • Malfunction warning light (Check Engine) is on
  • Incorrect operation of brake lights

Causes

  • Faulty brake light switch
  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Relay problems
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check the operation of the brake lights
  2. Check the brake light switch and its adjustment
  3. Inspect the wiring harness for damage
  4. Check contacts in connectors
  5. Test relay (if applicable)
  6. If necessary, replace the brake light switch

Related codes

Error P0572 by Vehicle Brand

FAQ

What does the P0572 code mean?

P0572 is an OBD-II diagnostic trouble code that indicates: Brake Switch A Circuit Low

What causes a P0572 error code?

The most common causes of P0572 include: Faulty brake light switch; Open or short circuit in wiring harness; Poor contact in connectors; Relay problems.

How do I fix a P0572 diagnostic trouble code?

To fix P0572: Check the operation of the brake lights. Check the brake light switch and its adjustment. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0572?

Limited driving only, diagnose soon

How much does it cost to fix P0572?

The estimated repair cost for P0572 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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