OBD Guide

C057A

Brake Booster Temperature Sensor B Circuit High

C057A is an OBD-II diagnostic trouble code meaning: Brake Booster Temperature Sensor B Circuit High. Common causes: brake booster temperature sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced braking performance
  • Unusual behavior of the braking system (for example, delayed response)

Causes

  • Brake booster temperature sensor malfunction
  • Open or short circuit in wiring harness
  • Problems with the vacuum brake booster
  • Malfunction of the brake control unit (ECU)

How to Fix

  1. Check the brake booster temperature sensor for damage.
  2. Check the wiring harness and connectors for opens and short circuits
  3. Replace sensor if necessary
  4. Check the operation of the brake booster

Related codes

Error C057A by Vehicle Brand

FAQ

What does the C057A code mean?

C057A is an OBD-II diagnostic trouble code that indicates: Brake Booster Temperature Sensor B Circuit High

What causes a C057A error code?

The most common causes of C057A include: Brake booster temperature sensor malfunction; Open or short circuit in wiring harness; Problems with the vacuum brake booster; Malfunction of the brake control unit (ECU).

How do I fix a C057A diagnostic trouble code?

To fix C057A: Check the brake booster temperature sensor for damage.. Check the wiring harness and connectors for opens and short circuits. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C057A?

Limited driving only, diagnose soon

How much does it cost to fix C057A?

The estimated repair cost for C057A is $33–111. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat