What this code means

Malfunction in the left front ABS wheel speed sensor.

Symptoms

• ABS light on
• Traction control light on
• Stability control light on
• ABS not functioning

Common causes

• Faulty wheel speed sensor
• Damaged tone ring
• Wiring damage
• Sensor gap contamination (metallic debris)
• Wheel bearing failure

Diagnostic steps

1. Inspect sensor and tone ring
2. Test sensor resistance
3. Check air gap
4. Inspect wiring
5. Scope sensor signal
6. Check wheel bearing for play

Repair notes

Replace wheel speed sensor. Clean tone ring. Check wheel bearing.

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