P1680 on the 2004 GMC Envoy
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.
| 040604038 | 2005-02-15. Service bulletin. SERVICE ENGINE SOON LIGHT ON, P1680. *TT |
|---|---|
| 3138 | 2005-02-01. Service bulletin. REDUCED POWER LIGHT ON AND DIAGNOSTIC TROUBLE CODE P1680 P1221 AND OR P1271 STORED IN THE POWERTRAIN CONTROL MODULE. *EH |
| 3138 | 2004-11-04. Service bulletin. REDUCED POWER LIGHT ON AND DIAGNOSTIC TROUBLE CODE P1680 P1221 AND/OR P1271 STORED IN THE POWER CONTROL MODULE. *SC |
| 01917 | 2004-05-14. Service bulletin. FALSE DIAGNOSTIC TROUBLE CODE (DTC) P1680. *TT |
4 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.