C1278 on the 2003 Ford Expedition
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 17133 | 2003-11-17. Service bulletin. ADVANCETRAC LIGHTING ON WITH DIAGNOSTIC TROUBLE CODE C1277 (STEERING WHEEL ANGLE 1 AND 2 CIRCUIT FAILURE) OR C1278 (STEERING WHEEL ANGLE 1 AND 2 SIGNAL FAULTED) IN THE IVD MODULE. *TT |
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| 17001 | 2003-11-05. Service bulletin. ADVANCETRAC MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE C1277 (STEERING WHEEL ANGLE 1 AN 2 CIRCUIT FAILURE) OR C1278 (STEERING WHEEL ANGLE 1 AND 2 SIGNAL FAULTED) IN THE IVD MODULE. *TT |
2 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.