# P0400 on the 2016 Subaru Crosstrek

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 P0400

- [10171917](https://open.wenmarpro.com/bulletins/10171917), 2020-03-02: This bulletin announces availability of reprogramming files to optimize the Engine Control Module \(ECM\). These new files address concerns of the check engine light coming on and setting a DTC P0400: EGR “A” FLOW. The DTC can set if the ECM tests the EGR system when ambient / intake air temperatures are below freezing.