Odd DEF message

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Mar 20, 2026 | 12:51 PM

goatdriver

Thread Starter

Mountain Pass

Joined: Mar 2004

Posts: 170

Likes: 1

Odd DEF message

Started my 2023 F150 5.0 and saw a message on the screen about DEF fluid and exhaust filter.

What in the world?

Mar 21, 2026 | 06:37 AM

charlie g

FTE Community Team

Joined: Dec 2023

Posts: 8,681

Likes: 4,209

From: sussex county, nj

thats a first. time to ask a dealer

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