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2006 LEXUS GS 430
4.3L V8•RWD•AUTOMATIC•gas
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Repairs0Labor478Torque2122Fluid8DTC1846Battery1Maintenance0Recalls0
C1242high severityChassis

Open in IG1 Power Source Circuit

on 2006 Lexus GS 430 4.3L V8 · RWD

What this code means

The ABS module has lost the IG1 ignition power source signal, indicating an open circuit. No direct OBD P-code equivalent exists for this manufacturer-specific code.

Symptoms

  • ABS warning light on
  • ABS system inoperative
  • Brake warning light on

Common causes

  • Blown IG1 fuse
  • Open wiring in IG1 circuit
  • Faulty ignition switch
  • Poor connector contact at ABS ECU

Diagnostic steps

  1. Check IG1 fuse
  2. Verify ignition switch operation
  3. Test IG1 voltage at ABS connector
  4. Inspect and repair IG1 wiring
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