P2438: AIR System Air Flow/Pressure Sensor Circuit High Bank 2
What Does P2438 Mean?
P2438 is a diagnostic trouble code indicating: AIR System Air Flow/Pressure Sensor Circuit High Bank 2. This code relates to the powertrain system. It has been reported in NHTSA complaints across 1 different vehicle models.
Symptoms of P2438
- ⚠️ Check engine light illuminated
- ⚠️ Vehicle enters limp/reduced power mode
P2438 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"TAKATA RECALL - ERROR CODE P2437 AND P2438. MY TRUCK HAS 76000 MILES ON IT AND IS NOW IN LIMP MODE. IT WAS VERY SCARY WHEN IT WENT THERE ON THE HIGHWAY. I'VE SEEN ONLINE THIS PROBLEM EXISTING ON OTHER TOYOTA VEHICLES AND THEY HAVE RECALLS, BUT NOT THE TACOMA. THIS PROBLEM NEEDS TO BE ADDRESSED. THE "
— Toyota Tacoma owner, 05/05/2018
"2012 TACOMA WITH 24K MILES. CHECK ENGINE LIGHT AND TRC LIGHT CAME ON WITH TRUCK IN LIMP MODE WHEN I STARTED IT TO GO TO WORK. CODES P0412 P2433 P2438 P2442. TOYOTA WONT COVER THIS AND ITS A DEFECT IN MANY MANY 2012 TACOMAS."
— Toyota Tacoma owner, 05/08/2017
Source: NHTSA Complaints Database
Most Reported Vehicles for P2438
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | TOYOTA TACOMA |
P2438 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?
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.