P0418 on Toyota Tacoma
AIR System Control A Circuit
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 P0418.
- 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 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.
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."
"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."
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
-
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.