P2449AIR System High Air Flow (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2449 is the bank 2 high-flow fault of the AIR system: during or after the air injection phase the second bank receives more air than predicted. Ford assigns it in its 2012 OBD summary to the bank 2 secondary air readiness, next to P0492 for too little flow, so the code belongs to Ford's AIR monitor even though no threshold is published. Likely causes mirror bank 1: a bank 2 shut-off or check valve that does not seal, a relay that keeps the pump running, or a lean signal that does not fit the model. Since excess air only leans out the mixture for a short time, drivers seldom notice anything beyond the warning lamp. The legal basis lies in CARB's AIR monitoring rules. P2448 is the bank 1 code, P0492 the low-flow partner.
- What you may notice
- Check engine lamp
- Usually no change in driving behaviour
- Likely causes
- LikelyBank 2 shut-off valve does not seal
- PossiblePump keeps running due to a sticking relay
- RareCheck valve on bank 2 leaking
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.