P2448

AIR System High Air Flow Bank 1

Q: Is it safe to drive with P2448?

Yes. The secondary air system operates mostly during cold starts for emissions, so it does not affect normal drivability. Repair it to clear the light and pass an emissions test.

Q: Can I just clear P2448?

It returns during the next cold-start test unless the valve, air pump, or sensor is repaired.

Secondary air injection Generic OBD-II Low

What it means

P2448 means the engine computer detected higher-than-expected air flow in the bank 1 secondary air injection (AIR) system, often from a valve stuck open or the air pump running when it should be off. This system works mainly during cold starts to reduce emissions, so the fault does not affect how the vehicle drives.

Low

Can I keep driving? Safe to drive. Secondary air injection mainly affects cold-start emissions, so the vehicle runs normally, but it may fail an emissions test.

Real-world scan data

Seen in

112

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
No noticeable change in how the vehicle drives
Occasional rough or higher idle right after a cold start
May fail an emissions/readiness test

Common causes

Most likely first

Secondary air switching/control valve stuck open on bank 1Likely
Air pump running when it should be off (stuck relay or control)Common
Failed or misreading AIR flow/pressure sensorCommon
Vacuum or control line leak at the air control solenoidLess often
Corroded or loose wiring/connector in the AIR circuitLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm when the excess air flow is detected (should be only during the cold-start test).
Check the secondary air switching/control valve for sticking open.
Verify the air pump and its relay shut off when commanded.
Inspect control vacuum lines and solenoids for leaks or faults.
Test the AIR flow/pressure sensor against spec, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2448?+

Yes. The secondary air system operates mostly during cold starts for emissions, so it does not affect normal drivability. Repair it to clear the light and pass an emissions test.

Can I just clear P2448?+

It returns during the next cold-start test unless the valve, air pump, or sensor is repaired.

Read & clear P2448 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