P2104: owner reports and bulletins
Got P2104 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.
What owners report to NHTSA
30 complaints filed with NHTSA mention P2104, 11 of them since 2015, across 12 different models. The component owners most often filed it under: vehicle speed control.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| FORD F-150 | 6 | 2005, 2008 |
| FORD FUSION | 5 | 2008, 2009, 2011 |
| FORD FREESTYLE | 4 | 2005, 2006, 2007 |
| FORD EXPEDITION | 3 | 2005 |
| FORD EXPLORER | 3 | 2004, 2005, 2006 |
| FORD 500 | 3 | 2005, 2006 |
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.