P2443: AIR System Switching Valve Stuck Closed Bank 2
What Does P2443 Mean?
P2443 is a diagnostic trouble code indicating: AIR System Switching Valve Stuck Closed Bank 2. This code relates to the powertrain system. It has been reported in NHTSA complaints across 6 different vehicle models.
Symptoms of P2443
- ⚠️ Check engine light illuminated
- ⚠️ Traction control system activated
- ⚠️ Vehicle enters limp/reduced power mode
P2443 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"THE CHECK ENGINE LIGHT AND THE TRAC OFF LIGHT CAME ON AS I WAS MERGING ONTO THE INTERSTATE. I IMMEDIATELY STOPPED THE VEHICLE, PULLED OVER, AND TOOK MY 2012 TOYOTA TACOMA WITH 78,000 MILES TO THE MECHANIC WHERE I LEFT IT OVERNIGHT FOR THEM TO LOOK AT IT IN THE MORNING. RUNNING A DIAGNOSTIC THEY FOUN"
— Toyota Tacoma owner, 01/03/2018
"CODE P2443 VALVE STUCK CLOSED CAME UP WHEN MY "TRAC AND CEL" LIGHTS CAME UP ON THE DASH. THIS HAPPENED ON STARTUP. THIS CODE IS A FAILURE OF THE SECONDARY AIR INJECTION SWITCHING VALVE STUCK CLOSED. THIS CONDITION CAN LEAD TO LOST POWER WHEN DRIVING CALLED A "LIMP MODE" AND IS OCCURRING ON TOYOTA TA"
— Toyota Tacoma owner, 12/04/2017
"I have had my secondary air pump replaced twice already. Now six months later am having the same codes and the truck is back at the dealership. Throws code p2443 valve stuck closed.....on a 6 month old part. This w=has been an issue with this and other toyota models since 2012. Why is there no recal"
— Toyota Tacoma owner, 10/04/2024
Source: NHTSA Complaints Database
Most Reported Vehicles for P2443
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | TOYOTA TACOMA | |
| 2 | TOYOTA 4RUNNER | |
| 3 | TOYOTA TUNDRA | |
| 4 | SUBARU FORESTER | |
| 5 | SUBARU IMPREZA | |
| 6 | SUBARU WRX |
P2443 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
Reported Repair Costs for P2443
Based on 10 owner-reported repair costs from NHTSA complaints.
⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.
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)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.