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2007 LEXUS GS 430
4.3L V8•RWD•AUTOMATIC•gas
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Repairs0Labor478Torque2122Fluid8DTC1857Battery1Maintenance0Recalls0
C1243high severityChassis

Deceleration Sensor Malfunction

on 2007 Lexus GS 430 4.3L V8 · RWD

What this code means

The deceleration (G) sensor used by the ABS/traction system is reporting a fault or implausible signal. No direct OBD P-code equivalent exists for this manufacturer-specific code.

Symptoms

  • ABS warning light on
  • VSC/traction light on
  • Reduced braking assist

Common causes

  • Faulty deceleration sensor
  • Loose sensor mounting
  • Corroded sensor connector
  • Damaged sensor wiring

Diagnostic steps

  1. Scan for deceleration sensor codes
  2. Inspect sensor mounting and connector
  3. Check sensor signal with scan tool
  4. Replace deceleration sensor if faulty
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