Help with Code Reader

[Sonic2711]

Chevy Sonic. 2013. Was pulling a thermostat code P0597 P0598. i changed out the tstat and housing and hoses. engine light is now off!

When I hook up the code reader, it says 0 Codes Present. But under stored and pending they still show??? I did erase codes. still there. Any thoughts?

 

[orangeltz13]

Chevy Sonic. 2013. Was pulling a thermostat code P0597 P0598. i changed out the tstat and housing and hoses. engine light is now off!

When I hook up the code reader, it says 0 Codes Present. But under stored and pending they still show??? I did erase codes. still there. Any thoughts?

It's probably historical data. It will probably disappear after a few ignition cranks.

 

[Sonic2711]

The thermostat codes did clear after a couple starts. Thank you.