TSB 21M04 — Ford Service bulletin
21M04 is a service bulletin on file with NHTSA for 2 Ford models, 2011–2014 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Certain 2011-2014 Model Year Super Duty Vehicles Equipped with a 6.7L Diesel Engine Exhaust Gas Recirculation Cooler with Diagnostic Trouble Codes P0401 and/or P2457 - In some of the affected vehicles, customers may experience an illuminated malfunction indicator light due to…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 21M04 names
| Vehicle | Model years |
|---|---|
| Ford F-250 | 2011, 2012, 2013, 2014 |
| Ford F-350 | 2011, 2012, 2013, 2014 |
Every document filed under 21M04
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| 21M04 | May 17, 2022 | Service bulletin |
| 21M04 | January 14, 2022 | Service bulletin |
What 21M04 covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 21M04?
21M04 is a service bulletin filed with NHTSA by Ford, covering 2 Ford models across the 2011–2014 model years. NHTSA's summary reads: Certain 2011-2014 Model Year Super Duty Vehicles Equipped with a 6.7L Diesel Engine Exhaust Gas Recirculation Cooler with Diagnostic Trouble Codes P0401 and/or P2457 - In some of the affected vehicles, customers may experience an illuminated malfunction indicator light due to…
Which vehicles does 21M04 cover?
NHTSA's file names Ford F-250 (2011–2014); Ford F-350 (2011–2014). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 21M04 a recall, and is the repair free?
No. 21M04 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 21M04?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 21M04, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 21M04. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.