P2430
AIR System Air Flow/Pressure Sensor Circuit Bank 1
Secondary air injection (AIR)
Generic OBD-II
Low
What it means
P2430 means the ECM sees a circuit fault from the Bank 1 secondary-air injection airflow/pressure sensor — the sensor that confirms the pump is delivering air into the exhaust at cold start. It's usually a sensor, wiring, or blocked-hose problem. Because secondary air runs only briefly at startup, the car drives normally; the fault mainly affects emissions monitoring.
Low
Can I keep driving? Yes — the secondary-air sensor mainly affects cold-start emissions; the car drives normally, though it may fail an emissions test.
Common symptoms
What you'll notice
- Check-engine light on
- Usually no noticeable change in how the car drives
- Possibly a slightly rough cold start
- May fail an emissions/readiness check
Common causes
Most likely first
- Faulty secondary-air airflow/pressure sensor (Bank 1)Likely
- Sensor wiring or connector faultCommon
- Disconnected or leaking sensor hose/portCommon
- Carbon or moisture blocking the sensor passageLess often
- ECM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame and live sensor data.
- Inspect the AIR pressure/flow sensor connector and wiring.
- Check the sensor's hose and port for blockage or leaks.
- Test the sensor's output against the manufacturer's spec.
- Replace the sensor if faulty, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2430?+
Yes — the secondary air system only runs briefly at cold start, so the car drives normally. The main effect is on emissions, so fix it before an emissions test.
Can I just clear P2430?+
It returns once the ECM re-checks the sensor circuit. The sensor, wiring, or blocked passage has to be addressed.
Related codes
Often seen with P2430
Read & clear P2430 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