OBD Guide

C0165

Antilock Brake System/Traction Control System Brake Switch/Sensor Circuit Open

C0165 is an OBD-II diagnostic trouble code meaning: Antilock Brake System/Traction Control System Brake Switch/Sensor Circuit Open. Common causes: broken or damaged wiring harness, faulty brake pedal sensor. Estimated repair cost: $33–111.

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

Symptoms

  • ABS/TCS indicator is on
  • Incorrect operation of ABS/TCS
  • Disabling cruise control
  • Lack of response to pressing the brake pedal

Causes

  • Broken or damaged wiring harness
  • Faulty brake pedal sensor
  • Poor contact in the sensor connector
  • Problems with the ABS control unit

How to Fix

  1. Check the condition of the wiring harness and connectors
  2. Test the brake pedal sensor
  3. Check voltage and resistance in the circuit
  4. Replace faulty components

Related codes

Error C0165 by Vehicle Brand

FAQ

What does the C0165 code mean?

C0165 is an OBD-II diagnostic trouble code that indicates: Antilock Brake System/Traction Control System Brake Switch/Sensor Circuit Open

What causes a C0165 error code?

The most common causes of C0165 include: Broken or damaged wiring harness; Faulty brake pedal sensor; Poor contact in the sensor connector; Problems with the ABS control unit.

How do I fix a C0165 diagnostic trouble code?

To fix C0165: Check the condition of the wiring harness and connectors. Test the brake pedal sensor. Check voltage and resistance in the circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0165?

Limited driving only, diagnose soon

How much does it cost to fix C0165?

The estimated repair cost for C0165 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat