P2440 on TOYOTA TACOMA — AIR System Switching Valve Stuck Open Bank 1

Q: "What does P2440 mean on a TOYOTA TACOMA?"

"P2440 indicates: AIR System Switching Valve Stuck Open Bank 1. This is a powertrain code. 57 TOYOTA TACOMA owners have reported this to NHTSA."

Q: "What are the most common causes of P2440 on TOYOTA TACOMA?"

"Based on 57 NHTSA reports, the most commonly cited components are: Engine, Fuel/Propulsion System, Unknown Or Other,Engine. These percentages are based on the component field in owner complaints."

Q: "Is P2440 serious on my TOYOTA TACOMA?"

"Of 57 NHTSA reports for this code on TOYOTA TACOMA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my TOYOTA TACOMA shows P2440?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P2440 Means on Your TOYOTA TACOMA

P2440 is a diagnostic trouble code indicating: AIR System Switching Valve Stuck Open Bank 1. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

57 TOYOTA TACOMA owners have reported this issue to NHTSA across model years 2012-2015. Most reports come from the 2012, 2013 model years. The most commonly reported component is Engine (54.4% of reports).

Real TOYOTA TACOMA Owner Reports

Source: NHTSA Complaints Database

"On my 2012 tacoma the code p2440 and p2442 which represent a stuck open valve in the secondary air injection system. upon my research into this issue on forums i have learned this is a common problem with the toyota systems particularly the 2012 tacoma."

— 2012 TOYOTA TACOMA owner · ENGINE · Filed 04/10/2020

"Failure of the secondary air injection system p2440 and p2442, while the vehicle was moving onto a city street from a parking lot. when accelerating immediately there was a decrease in power and the check engine light along with the "trac off" light illuminating simultaneously."

— 2012 TOYOTA TACOMA owner · ENGINE · Filed 12/30/2019

"While on a road trip i had my check engine light come on while on the highway due to defective secondary injection valves being stuck closed/open. the codes i had for this issue is p2440 and p2442."

— 2012 TOYOTA TACOMA owner · ENGINE · Filed 04/25/2019

"Having trouble with my vehicles secondary air injection system, replacement parts are super expensive and have seen many people have the same issue, seems like a non-reliable component. always get the fault codes p2440 and p2442. i strongly beleive that this is a defective component."

— 2012 TOYOTA TACOMA owner · ENGINE · Filed 02/04/2019

"Cil and trac illumination with codes p2440 and p2442 caused the engine to go to limp mode with loss of power"

— 2012 TOYOTA TACOMA owner · ENGINE · Filed 04/28/2019

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

55

'12

1

'13

1

'15

Common Causes on TOYOTA TACOMA

Based on NHTSA complaint component analysis for this vehicle.

ENGINE 54.4%

FUEL/PROPULSION SYSTEM 14%

UNKNOWN or OTHER,ENGINE 5.3%

UNKNOWN or OTHER 5.3%

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE 3.5%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P2440 mean on a TOYOTA TACOMA? ▾

P2440 indicates: AIR System Switching Valve Stuck Open Bank 1. This is a powertrain code. 57 TOYOTA TACOMA owners have reported this to NHTSA.

What are the most common causes of P2440 on TOYOTA TACOMA? ▾

Based on 57 NHTSA reports, the most commonly cited components are: Engine, Fuel/Propulsion System, Unknown Or Other,Engine. These percentages are based on the component field in owner complaints.

Is P2440 serious on my TOYOTA TACOMA? ▾

Of 57 NHTSA reports for this code on TOYOTA TACOMA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my TOYOTA TACOMA shows P2440? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P2440 on Other Vehicles

→ All codes reported on TOYOTA TACOMA