OBD Guide

C1323

Brake Hydraulic Master Cylinder Piston Travel Sensor 1 Signal Fault

C1323 is an OBD-II diagnostic trouble code meaning: Brake Hydraulic Master Cylinder Piston Travel Sensor 1 Signal Fault. Common causes: piston stroke sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS/ESP indicator is on
  • Incorrect operation of the brake system
  • Loss of braking efficiency

Causes

  • Piston stroke sensor malfunction
  • Open or short circuit in the sensor circuit
  • Problems with the brake system control unit

How to Fix

  1. Check the integrity of the sensor and its fastening
  2. Check the wiring harness for opens and shorts
  3. Test the sensor using diagnostic equipment
  4. Replace sensor if necessary

Related codes

FAQ

What does the C1323 code mean?

C1323 is an OBD-II diagnostic trouble code that indicates: Brake Hydraulic Master Cylinder Piston Travel Sensor 1 Signal Fault

What causes a C1323 error code?

The most common causes of C1323 include: Piston stroke sensor malfunction; Open or short circuit in the sensor circuit; Problems with the brake system control unit.

How do I fix a C1323 diagnostic trouble code?

To fix C1323: Check the integrity of the sensor and its fastening. Check the wiring harness for opens and shorts. Test the sensor using diagnostic equipment. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1323?

Limited driving only, diagnose soon

How much does it cost to fix C1323?

The estimated repair cost for C1323 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat