OBD Guide

C0518

Left Front Wheel Speed Sensor - Mechanical

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

Symptoms

  • ABS/ESP indicator is on
  • Unstable ABS operation
  • Problems with the stabilization system
  • Incorrect speed readings on the speedometer

Causes

  • Damage to the wheel speed sensor
  • Sensor or pulse ring dirty
  • Incorrect gap between sensor and impulse ring
  • Pulse ring damage
  • Corrosion or oxidation of contacts

How to Fix

  1. Visual inspection of the sensor and pulse ring
  2. Checking the gap between the sensor and the impulse ring
  3. Cleaning the Sensor and Pulse Ring
  4. Replace the sensor if necessary
  5. Replacing the impulse ring if damaged
  6. Checking and cleaning wiring harness contacts

Related codes

Error C0518 by Vehicle Brand