P2447
AIR System Pump Stuck Off Bank 2
Secondary air injection (emissions)
Generic OBD-II
Low
What it means
P2447 means the secondary air injection pump for bank 2 isn't producing airflow when commanded — it's effectively stuck off. Because this pump only runs briefly at cold start to cut emissions, the car drives normally. Common causes are a seized pump, a failed relay or fuse, wiring faults, or a blocked air passage.
Low
Can I keep driving? Safe to drive — the secondary air pump only runs briefly at cold start, so this is an emissions fault that doesn't affect normal driving.
Common symptoms
What you'll notice
- Check-engine light on
- Usually no change in drivability
- Possible slightly rough idle or higher emissions right after a cold start
- May fail an emissions/readiness test
Common causes
Most likely first
- Faulty or seized secondary air pump (bank 2)Likely
- Failed air pump relay or blown fuseCommon
- Wiring or connector fault to the pumpCommon
- Stuck air-switching valve or blocked/carbon-plugged air passageLess often
- Faulty control solenoid or vacuum lineLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the pump isn't running when commanded.
- Check the air pump relay, fuse, and power/ground at the pump.
- Command the pump on with a scan tool and listen/feel for operation.
- Inspect the switching valve, check valve, and air passages for blockage.
- Replace the air pump if it's seized and the supply is good, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2447?+
Yes. The pump only helps warm-up emissions, so the car drives normally, but it should be repaired to pass emissions and clear the light.
Can I just clear P2447?+
It returns on the next cold-start monitor if the pump still won't run. Fix the pump, relay, or wiring first.
Related codes
Often seen with P2447
Read & clear P2447 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX