Misfire and stabilitrack codes after changing starter

[wolff1]

Any ideas on what could cause p300 code obvious ruff idle and stablitrack,traction contol, flashing check engine light after starter replacement ran fine before starter change

 

[OR VietVet]

When anything was working fine till you touched it, then go back and inspect for any problems during your starter replacement steps.

Care to share the vehicle info? Secret? Not under warranty?

 

[Joseph Garcia]

As @OR VietVet suggested, retrace all of your steps in the starter replacement project to be sure that something was not inadvertently touched/moved/disconnected.

If nothing pops up, then disconnect both of your battery cables and touch the 2 cables together for 10+ seconds to discharge all connected capacitors, which often causes a reset that could resolve your issue.