Secondary Air Injection System Malfunction
The P0410 code means the vehicle's onboard diagnostic system has detected: Secondary Air Injection System Malfunction. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $200 - $700 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Affiliate links — we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light illuminated
- Loud noise from air pump area on cold start
- Rough idle during cold start
- Failed emissions test
- Sulfur or rotten egg smell on cold start
Probable Causes (Ranked by Likelihood)
- Failed secondary air injection pump Very High
- Stuck or failed air injection check valve High
- Clogged or deteriorated air injection hoses Moderate
- Faulty air pump relay or fuse Moderate
- Failed air pump control solenoid valve Low
Common Fixes by Vehicle
What techs usually find when diagnosing P0410 on specific vehicles — tap your vehicle for the fix and the exact part:
2000-2013 Chevrolet Silverado/Tahoe 5.3L/6.0L Moderate DIY
Secondary air injection pump failure is extremely common on GM trucks. The check valves in the exhaust manifolds rust shut, causing backpressure that kills the pump. Replace both check valves (Dorman) and the air pump (ACDelco) together or the new pump will fail. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
Labor: 2-3 hours2001-2006 BMW 325i/330i E46 3.0L Moderate DIY
The secondary air pump seizes from moisture ingestion. Listen for a loud whirring or grinding noise on cold start. Replace the air pump and the one-way check valve on the exhaust manifold. BMW part 11-72-7-553-056 or aftermarket Pierburg equivalent.
Labor: 1.5-2 hours2006-2014 Subaru Outback/Legacy 2.5L Moderate DIY
The secondary air pump valve (reed valve) sticks closed from carbon buildup on Subaru boxers. Remove the valve from the exhaust manifold and clean with carb cleaner. If the reeds are cracked or warped, replace the valve assembly. Also check the vacuum hose for cracks.
Labor: 1-2 hoursFrequently Asked Questions
Can I drive with code P0410?
Yes. The secondary air injection system only operates during cold starts to help the catalytic converter warm up faster. It does not affect normal driving performance, but you will fail emissions testing.
What does the secondary air injection pump do?
The air pump injects fresh air into the exhaust manifold during cold starts. This extra oxygen helps burn unburned fuel in the exhaust and heats the catalytic converter faster to reduce cold-start emissions.
Is the secondary air pump expensive to replace?
The pump itself costs $100-$400 depending on the vehicle. Labor varies from $100-$300. On some vehicles like GM trucks, moisture entering the pump through deteriorated check valves is a common failure mode.
What actually makes the computer set this secondary air code?
California's OBD II regulation requires the system to flag secondary air before a DECREASE from the manufacturer's specified air flow large enough to push emissions past 1.5 times the FTP standards, monitored per bank where the system has separate flow paths (Title 13 CCR 1968.2, section (e)(5.2)). Worth knowing: the regulation sets no corresponding threshold for too MUCH air flow, so excess-flow codes come from the manufacturer's own strategy rather than from a regulated limit. This is the threshold the monitor is designed around, not a description of your specific fault — the regulation says what the system must detect, not how to find it on your vehicle.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Listen for the air pump running during cold start -- it should run for 30-120 seconds
-
Check the air pump fuse and relay -- swap the relay with a known-good one if available
-
Inspect air injection hoses for cracks, collapse, or water intrusion
-
Command the air pump on with a scan tool and verify airflow at the check valve
-
Check the air injection check valve for proper sealing and movement
Sources 3
This page is built from documented references. Verify against your own service info before repair work.
- California Code of Regulations, Title 13 section 1968.2 (OBD II)malfunction criteria, section (e)
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2000-2010 Chevrolet Silverado
- 2001-2012 GMC Sierra
- 2003-2014 Chevrolet Trailblazer
- 1999-2010 Volkswagen Jetta
- 2002-2008 BMW 325i
Related Codes
See All Codes & Fixes for Your Vehicle
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.