P0622 on the 2004 GMC Canyon
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.
| 04192004 | 2004-09-17. Service bulletin. SERVICE ENGINE SOON LAMP BEING ILLUMINATED. WITH DIAGNOSTIC TROUBLE CODES P0507, P0621 OR P0622. GM VOICEMAIL EXPRESS. *TT |
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| 02065 | 2004-07-10. Service bulletin. DIAGNOSTIC TROUBLE CODE (DTC) P0621 AND/OR P0622. BATTERY CHARGE INDICATOR ILLUMINATED ON INSTRUMENT PANEL CLUSTER (IPC). *TT |
| 01787 | 2004-05-11. Service bulletin. BATTERY LIGHT AND OR MESSAGE ON DIC WITH OR WITHOUT P0621, P0622. *MR |
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.