P1639 on the 2000 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.
| 0258 | 2002-11-04. Service bulletin. INOPERATIVE OR INACURRATE SPEEDOMETER, 4X4 LAMP ILLUMINATD, AND / OR DIAGNOSTIC TROUBLE CODE P1635 OR P1639. *TT |
|---|---|
| 13737 | 2001-07-23. Service bulletin. INOPERATIVE OR INACCURATE SPEEDOMETER AS WELL AS 4X4 LIGHT INOPERATIVE AND / OR DIAGNOSTIC TROUBLE CODE P1635 AND / OR P1639 AFTER A POWERTRAIN CONTROL MODULE (PCM) HAS BEEN REPLACED. *TT |
| 00142 | 2001-04-16. Service bulletin. INOPERATIVE OR INACCURATE SPEEDOMETER, 4X4 LAMP ILLUMINATED AND / OR DIAGNOSTIC TROUBLE CODES (DTCS) P1635 OR P1639 PRESENT AFTER A POWERTRAIN CONTROL MODULE (PCM) OR INSTRUMENT CLUSTER REPLACEMENT. *JB |
3 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.