P0418 on TOYOTA TACOMA — AIR System Control A Circuit

Q: "What does P0418 mean on a TOYOTA TACOMA?"

"P0418 indicates: AIR System Control A Circuit. This is a emission controls code. 2 TOYOTA TACOMA owners have reported this to NHTSA."

Q: "What are the most common causes of P0418 on TOYOTA TACOMA?"

"Based on 2 NHTSA reports, the most commonly cited components are: Fuel/Propulsion System, Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints."

Q: "Is P0418 serious on my TOYOTA TACOMA?"

"Of 2 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 P0418?"

"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 P0418 Means on Your TOYOTA TACOMA

P0418 is a diagnostic trouble code indicating: AIR System Control A Circuit. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 TOYOTA TACOMA owners have reported this issue to NHTSA across model years 2014-2015. Most reports come from the 2014, 2015 model years. The most commonly reported component is Fuel/Propulsion System (50.0% of reports).

Real TOYOTA TACOMA Owner Reports

Source: NHTSA Complaints Database

"Air injection pump and air switching valve assembly. vehicle generated an obd code of p0418 and p2441. vehicle only has 66k miles. vehicle is unable to accelerate to normal driving speeds, very sluggish. cost to repair is $2k."

— 2014 TOYOTA TACOMA owner · FUEL/PROPULSION SYSTEM · Filed 01/18/2019

"When starting vehicle (2015 Tacoma TRD Sport) on a cold morning, received check engine light and trac light. Used code reader and received code P0418 Secondary Air Injection System Control A Circuit error. I reset the code and it came back immediately. I did some research and it is a known issue."

— 2015 TOYOTA TACOMA owner · ENGINE,FUEL/PROPULSION SYSTEM · Filed 03/28/2023

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

📊 Complaint Trend by Model Year

1

'14

1

'15

Common Causes on TOYOTA TACOMA

Based on NHTSA complaint component analysis for this vehicle.

FUEL/PROPULSION SYSTEM 50%

ENGINE,FUEL/PROPULSION SYSTEM 50%

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 P0418 mean on a TOYOTA TACOMA? ▾

P0418 indicates: AIR System Control A Circuit. This is a emission controls code. 2 TOYOTA TACOMA owners have reported this to NHTSA.

What are the most common causes of P0418 on TOYOTA TACOMA? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Fuel/Propulsion System, Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints.

Is P0418 serious on my TOYOTA TACOMA? ▾

Of 2 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 P0418? ▾

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.

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