# P0521 on the 2020 Chevrolet Express

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 P0521

- [10178334](https://open.wenmarpro.com/bulletins/10178334), 2020-08-10: This Preliminary information communicates A vehicle may have a concern of no oil pressure and/or P0521 set. the releif valve in the pump is sticking or the number 1 main bearing is damaged. Drop oil pan and confirm \#1 main is spun or not. If bearings are OK Then change oil pump.