OBD Guide

C0102

Rear ABS Wheel Speed Sensor Left

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

Symptoms

  • The ABS indicator on the instrument panel is on
  • ABS system does not work when braking
  • Incorrect operation of the ESP system (if installed)

Causes

  • Open or shorted sensor wiring harness
  • Damage to the wheel speed sensor
  • Contamination or damage to the gear rotor
  • ABS control unit malfunction

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Clean or replace wheel speed sensor
  3. Check the condition of the gear rotor
  4. Diagnose the ABS control unit

Related codes

Error C0102 by Vehicle Brand