# P0621 on the 2015 Chevrolet Impala

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

- [10201128](https://open.wenmarpro.com/bulletins/10201128), 2021-09-07: Malfunction Indicator Lamp \(MIL\) Illuminated with DTCs P2096 and/or P0621 Set
- [10114726](https://open.wenmarpro.com/bulletins/10114726), 2017-08-15: This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent "Service Charging System" message on the Driver Information Center or a Battery Malfunction Indicator Lamp during an auto stop event. If there is no fault found during diagnostics for P0621 contact General Motors Technical Assistance Center for further assistance.
- [10113526](https://open.wenmarpro.com/bulletins/10113526), 2017-08-15: This preliminary informational bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp \(MIL\) Illuminated with technicians finding DTCs P2096 and/or P0621 set.
- [10057594](https://open.wenmarpro.com/bulletins/10057594), 2015-06-11: GENERAL MOTORS 2014\-2015 CHEVROLET MALIBU, 2015 CHEVROLET IMPALA: INTERMITTENT SERVICE CHARGING SYSTEM MESSAGE/ BATTERY MIL DTC P0621. \*LJ