TSB 2021–2023 F150 Diagnostic Trouble Codes — 26-2391

[F150 Tremor Forum]

Technical Service Bulletin · TSB 26-2391

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: Sep 3, 2026
Applies to: F-150 (2021–2023 model years)

Summary (official text)​

This bulletin updates 26-2206. Reason for update: update the Service Procedure to revise Steps 19-21, adding Step 22, and adding Figure 15-16 to clarify connector C316 location. Some of the vehicles listed in the Model statement above may exhibit diagnostic trouble codes (DTCs) C1001:31, U3000:89, and/or U3000:49 stored in the image processing module A (IPMA) and at least one of the following conditions: • "Front Camera Fault Service Required" message • Pre-collision assist inoperative • Adaptive cruise control inoperative • Front windshield camera alignment routine fails to complete This may be due to the coaxial cable between the IPMA camera and the IPMA.

Sources​

• TSB 26-2391 (PDF, NHTSA document 11037297) — Sep 3, 2026

Details from NHTSA as of Oct 9, 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.