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2009 LEXUS LS 460
4.6L V8•RWD•AUTOMATIC•gas
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Repairs0Labor484Torque3365Fluid7DTC1884Battery1Maintenance0Recalls0
C1237moderate severityChassis

Foreign Matter Attached on Tip of Rear Speed Sensor RH

on 2009 Lexus LS 460 4.6L V8 · RWD

What this code means

Metallic debris is stuck to the rear right wheel speed sensor tip, disrupting the signal. No direct OBD P-code equivalent for this chassis code.

Symptoms

  • ABS warning light on
  • Erratic rear RH wheel speed reading
  • Intermittent ABS activation

Common causes

  • Metal debris on sensor tip
  • Damaged sensor rotor/tone ring
  • Excessive sensor air gap
  • Faulty wheel speed sensor

Diagnostic steps

  1. Remove and clean sensor tip
  2. Inspect tone ring for damage
  3. Check sensor air gap
  4. Replace sensor if signal remains poor
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