P0734 on the 2004 Ford F-150
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 17305 | 2004-01-21. Service bulletin. SOME VEHICLES BUILT BEFORE 9/16/03 EQUIPPED WITH A 4.6L/5.4L ENGINE AND 4R75E TRANSMISSION MAY EXHIBIT THE TRANSMISSION CONCERN INDICATOR LAMP (TCIL) ON WITH DIAGNOSTIC TROUBLE CODE P0733 (3RD GEAR RATIO ERROR) AND/OR P0734 (4TH GEAR RATIO ERROR). *TT |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.