P2446 — AIR System Pump Stuck On Bank 2

What Does P2446 Mean?

P2446 is a diagnostic trouble code indicating: AIR System Pump Stuck On Bank 2. This code relates to the powertrain system. It has been reported in NHTSA complaints across 1 different vehicle models.

Symptoms of P2446

⚠️ Vehicle enters limp/reduced power mode

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"REPLACEMENT AIR INJECTION VALVES AND PUMPS FOR SECONDARY EMISSIONS CONTROL SYSTEM. TOYOTA WANTS 2200 FOR AN ISSUE THEY ARE AWARE OF AND HAVE ALREADY RELEASED SERVICE BULLETINS FOR ON THE TUNDRA AND SEQUOIAS. ENGINE CODES P2442 AND P2446. WHEN THE CODES ARE THROWN THE CAR IS PUT INTO LIMP MODE AND DE"
— Toyota Tacoma owner, 02/02/2017

Source: NHTSA Complaints Database

Most Reported Vehicles for P2446

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	TOYOTA TACOMA

Frequently Asked Questions

Can I drive with this code?

It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.

Will this code clear itself?

Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.

How do I find the exact cause?

A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P2446: AIR System Pump Stuck On Bank 2