I have a 2008 f250 6.4 powerstroke. Check engine light and reduced power. Code said it was thermostats. Installed new thermostats and upper/lower upgrade hoses myself. Replaced collant. Truck started sounds fine however message center still reduced power. How do I reset. Found plenty of info on how to repair myself but cant seem to find any on resetting computer. Thank you for your time in advance for any help.
Carpenter not Mechanic

 

can reset it by removing the negative terminal for some time, or usually it will self clear after several cycles if the problem is gone.