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2006 LEXUS GS 430

4.3L V8•RWD•AUTOMATIC•gas
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Repairs0Labor547Torque2337Fluid7DTC844Battery1Maintenance0Recalls0
P2441moderate severityPowertrain

Secondary Air Injection System Switching Valve Stuck Closed Bank 1

on 2006 Lexus GS 430 4.3L V8 · RWD

What this code means

The secondary air switching valve bank 1 is stuck closed, preventing air injection.

Symptoms

  • Check engine light
  • High emissions at cold start
  • Slow catalyst warm-up

Common causes

  • Corroded/stuck valve
  • No vacuum to valve
  • Carbon buildup

Diagnostic steps

  1. Check vacuum supply to valve
  2. Inspect valve mechanism
  3. Verify air pump operation

Repair notes

Replace valve or repair vacuum supply.

Other Powertrain codes on this vehicle

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