P0410 moderate

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.

My Garage →

Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $200 - $700 (parts and labor)

Recommended Tool

ANCEL AD310 OBD-II Scanner

Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Every Tech Needs This

AstroAI Digital Multimeter

Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.

Check Price on Amazon

Affiliate link -- 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

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

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 911-646) and the air pump (ACDelco 215-364) together or the new pump will fail.

Labor: 2-3 hours

Common fix part ACDelco Secondary Air Injection Pump View on Amazon→ Compare fitment at PartsGeek→

2001-2006 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 hours

Common fix part Pierburg Secondary Air Pump BMW View on Amazon→ Compare fitment at PartsGeek→

2006-2014 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 hours

Common fix part Subaru Secondary Air Valve Assembly View on Amazon→ Compare fitment at PartsGeek→

Frequently 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.