P2440 on TOYOTA TACOMA
AIR System Switching Valve Stuck Open Bank 1
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Toyota Tacoma context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P2440.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
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 fuel, air, emissions, or auxiliary powertrain control system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
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."
"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."
"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."
"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."
"Cil and trac illumination with codes p2440 and p2442 caused the engine to go to limp mode with loss of power"
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on TOYOTA TACOMA
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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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.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.