P0410

Q: What does OBD2 code P0410 mean?

P0410 means: Secondary Air Injection System. Fault in the secondary air injection (SAI) system. The SAI pumps fresh air into the exhaust during cold starts to reduce emissions and help the catalytic converter warm up faster.

Secondary Air Injection System

Fault in the secondary air injection (SAI) system. The SAI pumps fresh air into the exhaust during cold starts to reduce emissions and help the catalytic converter warm up faster.

SeverityMinor

CategoryEmissions

Est. Repair Cost$200–$800

Code TypePowertrain

DIY RepairProfessional

⚡ Common Causes

›Failed air injection pump
›Clogged or burned air injection check valves
›Failed air injection solenoid
›Broken air injection hose
›Corroded connections on SAI pump

⚠️ Symptoms

›Check engine light
›Failed emissions test
›Possible cold start noise from pump area
›Longer time for catalytic converter to reach efficiency

✅ How to Fix — Step by Step

Step 1:Test SAI pump operation — should hear it running for 2 minutes after cold start
Step 2:Inspect air injection check valves for clogging or burning
Step 3:Test solenoid valve operation
Step 4:Replace SAI pump if not running
Step 5:Clear carbon from check valves or replace

💡 Pro Tip: The SAI pump only runs during cold starts — you must test the system immediately after a cold start to verify pump operation.

Repair Cost Estimate

Full Repair Estimate

$200–$800

DIY Possible?

PRO

Severity

Minor

Frequently Asked Questions

What does OBD2 code P0410 mean?+

P0410 stands for Secondary Air Injection System. Fault in the secondary air injection (SAI) system. The SAI pumps fresh air into the exhaust during cold starts to reduce emissions and help the catalytic converter warm up faster.

What causes code P0410?+

Failed air injection pump; Clogged or burned air injection check valves; Failed air injection solenoid; Broken air injection hose; Corroded connections on SAI pump

How do I fix code P0410?+

Test SAI pump operation — should hear it running for 2 minutes after cold start; Inspect air injection check valves for clogging or burning; Test solenoid valve operation; Replace SAI pump if not running; Clear carbon from check valves or replace

How much does it cost to fix P0410?+

Estimated repair cost for P0410 is $200–$800.

Is P0410 DIY-friendly?+

P0410 typically requires professional equipment and a qualified mechanic.