# P0621 on the 2004 Chevrolet Colorado

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.

## Bulletins for this model year that name P0621

- [10009225](https://open.wenmarpro.com/bulletins/10009225), 2004-09-17: SERVICE ENGINE SOON LAMP BEING ILLUMINATED. WITH DIAGNOSTIC TROUBLE CODES P0507, P0621 OR P0622. GM VOICEMAIL EXPRESS. \*TT
- [10007762](https://open.wenmarpro.com/bulletins/10007762), 2004-07-10: DIAGNOSTIC TROUBLE CODE \(DTC\) P0621 AND/OR P0622. BATTERY CHARGE INDICATOR ILLUMINATED ON INSTRUMENT PANEL CLUSTER \(IPC\). \*TT
- [10006710](https://open.wenmarpro.com/bulletins/10006710), 2004-05-11: BATTERY LIGHT AND OR MESSAGE ON DIC WITH OR WITHOUT P0621, P0622. \*MR