TSB 2021–2026 F150 Illuminated Malfunction Indicator Lamp — 26-2432

[F150 Tremor Forum]

Technical Service Bulletin · TSB 26-2432

This is a Technical Service Bulletin, not a recall. A TSB tells dealers how to diagnose and repair a specific symptom when a truck comes in with it. It doesn't mean every truck listed has the problem, and it doesn't by itself make the repair free -- coverage depends on your warranty and the dealer's diagnosis.

Published: Oct 16, 2026
Applies to: F-150 (2021–2026 model years)

Summary (official text)​

This bulletin supersedes 26-2238. Reason for update: To update the Service Procedure to include diagnostics for the fuel vapor vent valve and the fuel tank isolation valve. Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P2450 stored in the powertrain control module (PCM). This may be due to a concern with the fuel vapor vent valve and/or the fuel tank isolation valve.

Supersedes: TSB 26-2238

Sources​

• TSB 26-2432 (PDF, NHTSA document 11038615) — Oct 16, 2026

Details from NHTSA as of Oct 23, 2026. If NHTSA or Ford revises this notice, this post is updated and significant changes are noted in a reply. The linked documents are the authority, and a dealer can confirm whether it applies to your VIN.

Have you experienced this issue with your truck? Let us know your model year and engine, plus any diagnosis or repair details.