P2449 Secondary air system: flow too high (bank 2)
P2449 means: Secondary air system: flow too high (bank 2). The secondary air system blows air into the exhaust on a cold start so the catalytic converter warms up faster. OK to drive, but have it checked soon. The most common repair costs about €200–400 in Estonia, depending on make and model.
What it means
The secondary air system blows air into the exhaust on a cold start so the catalytic converter warms up faster. The computer found too little air or a fault in the pump or valve control. Bank 2 is the side of a V engine without cylinder 1.
What you may notice
- Engine light on
- Unusual pump noise on a cold start
- Usually no change in driving
What could be wrong
- 1Air pump seized by moisture or burnt out · Secondary air pump or valve replacement €200–400
- 2Check valve stuck · Valve or actuator replacement €120–240
- 3Hose loose or cracked · Leak check and hose or gasket replacement €60–120
- 4Pump relay or fuse · Fuse replacement and cause check €30–60
Repair difficulty: Moderate
What you can check yourself
On a cold start, listen for the pump droning in the engine bay for a few seconds. You can check the simple things yourself, but the repair is best done in a workshop.
How we fix it
- We check pump and valve operation with the diagnostic tool
- We check the hoses and relay
- We replace the pump or valve
Standard SAE description: Secondary Air Injection System High Air Flow Bank 2