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2026 MAZDA CX-70
3.3L Turbo I6 Hybrid•AWD•AUTOMATIC•hybrid•turbo
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Repairs0Labor478Torque140Fluid7DTC1874Battery1Maintenance0Recalls0
P1499moderate severityPowertrain

Idle Air Control Valve Circuit Malfunction

on 2026 Mazda CX-70 3.3L Turbo I6 Hybrid · AWD

What this code means

The PCM detects a malfunction in the idle air control valve circuit operation. This affects idle speed stability.

Symptoms

  • Erratic idle
  • Engine stalling
  • Check engine light on

Common causes

  • Faulty IAC valve
  • Carbon buildup restricting valve
  • Damaged wiring or connector
  • Faulty PCM

Diagnostic steps

  1. Scan and record code data
  2. Inspect IAC valve and connector
  3. Test valve resistance and function
  4. Replace IAC valve if defective
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