P2430

AIR System Air Flow/Pressure Sensor Circuit Bank 1

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2430 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX