P0410 — Secondary Air Injection System Malfunction
Category: Powertrain Severity: Medium
Updated:
DTC code P0410 means: Secondary Air Injection System Malfunction. It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include failed secondary air pump (often water-damaged), stuck cut-off or check valve and pump relay or fuse; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed secondary air pump (often water-damaged)
- Stuck cut-off or check valve
- Pump relay or fuse
- Split secondary air hoses
Symptoms
- Check engine light
- Pump noise on cold start, or none at all
- Possible emissions test failure
How to diagnose it step by step
- Listen for the pump on a cold start.
- Check fuse and relay.
- Check hoses and check valve.
- Command the pump with a scan tool.
- Replace the failed part.
How to fix it
On a cold engine the pump should run 30–90 seconds after start. If it's silent, check the relay, fuse and pump; if it runs, check valves and hoses.
Estimated repair cost
Secondary air pump: $200–600. Valve: $80–250.
Frequently asked questions
What does DTC code P0410 mean?
Secondary Air Injection System Malfunction.
Is code P0410 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0410?
Yes, you can drive; it affects cold-start emissions.
Related codes
P0411 P0406 P0405 P0404 P0403 P0402 P0401 P0400 P0420 P0421
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