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2011 MAZDA MX-5 MIATA

2.0L I4•RWD•MANUAL•gas
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Repairs0Labor564Torque3725Fluid8DTC889Battery0Maintenance0Recalls0
P2440moderate severityPowertrain

Secondary Air Injection System Switching Valve Stuck Open Bank 1

on 2011 Mazda MX-5 Miata 2.0L I4 · RWD

What this code means

The secondary air injection switching valve on bank 1 is stuck in the open position.

Symptoms

  • Check engine light
  • Failed emissions test
  • Noise from air injection system

Common causes

  • Carbon deposits in valve
  • Failed diaphragm
  • Broken valve spring
  • Vacuum supply issue

Diagnostic steps

  1. Inspect valve operation
  2. Check vacuum supply
  3. Listen for air injection noise at idle

Repair notes

Replace secondary air switching valve.

Other Powertrain codes on this vehicle

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