Secondary Air Injection System Pump Stuck On Bank 1
What it means
P2444 means the bank 1 secondary air injection pump is running when it should be off — the ECM expected air injection to stop but still detects flow. It is usually a stuck-open control or check valve, a stuck relay, or a short holding the pump powered. The car generally drives fine, but injecting air into the exhaust out of schedule can upset the fuel mixture and overheat the pump, so fix it before long.
Can I keep driving? Yes — the car generally runs and drives normally, but running air into the exhaust at the wrong time can upset fuel trims and the pump may overheat, so repair it before long.
Common symptoms
What you'll notice
- Check-engine light on
- Secondary-air pump audibly running longer than it should
- Fails an emissions/readiness test
- Possible rough running or lean readings while air is injected out of schedule
Common causes
Most likely first
- Air control or check valve stuck open, leaving air flowingLikely
- Secondary-air pump relay stuck closed, keeping the pump poweredCommon
- Short in the pump control circuit holding it energizedCommon
- Carbon or debris jamming a valve openLess often
- Failed engine control module (ECM) command, least likelyLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the pump is running when it should be off.
- Check the secondary-air pump relay and its control circuit for a stuck-on condition.
- Inspect the air control and check valves for sticking or carbon jamming.
- Verify the ECM is commanding the pump off and the wiring is not shorted.
- Replace the stuck valve or relay, then clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P2444?+
Can I just clear P2444?+
Related codes
Often seen with P2444
Read & clear P2444 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.