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P0410: Secondary Air Injection System Malfunction

Severity: Low If the light is steady and the engine runs normally, schedule diagnosis. Stop for smoke, a burning electrical smell, or severe rough running; those are not normal secondary-air symptoms.

What does P0410 mean?

The secondary-air system failed its operation check. It supplies fresh air to the exhaust during certain cold-start conditions to reduce emissions; this is not the same system as the engine air filter or cabin blower.

Generic OBD-II definition: Secondary Air Injection System Malfunction. Confirm applicability in your vehicle service information.

Common causes

  • Failed or water-damaged air pump
  • Blown pump fuse or faulty relay
  • Leaking or stuck check valve or hose fault

Symptoms

  • Check engine light
  • Possible noisy air pump after startup
  • Usually little change after warm-up

Diagnostic focus

Replacing a water-filled pump without fixing the source of water can lead to repeat failure. Check the exhaust check valve and applicable service bulletins.

Can I keep driving with P0410?

Severity: Low If the light is steady and the engine runs normally, schedule diagnosis. Stop for smoke, a burning electrical smell, or severe rough running; those are not normal secondary-air symptoms.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

  • Inspect the pump fuse and relay circuit
  • Check for water intrusion and failed check valves
  • Verify pump operation and airflow during the cold-start test

Related codes

P0411
Secondary Air Injection System Incorrect Flow DetectedP0412
Secondary Air Injection System Switching Valve A CircuitP0418
Secondary Air Injection System Relay A CircuitP0491
Secondary Air Injection System Insufficient Flow (Bank 1)

Sources & review

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.