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2002 MAZDA PROTEGE5
2.0L I4•FWD•AUTOMATIC•gas
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Repairs0Labor495Torque3123Fluid7DTC910Battery1Maintenance0Recalls0
P2440moderate severityPowertrain

Secondary Air Injection System Switching Valve Stuck Open Bank 1

on 2002 Mazda Protege5 2.0L I4 · FWD

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.

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