I have a 2008 dodge ram 1500 4.7, my esp and bas warning lights are on i have tried replacing wheel sensors(i have replaced front and rear didn't work). I heard that air in the brakes could cause the light bleed all of the calipers and put fresh brake fluid in still the light is on. I have scanned the truck numerous times and i come up with a C121E code brake pressure sensor comparative. I'm running out of ideas and would like to get this problem solved. Thanks

 

Welcome to the site. When the tire pressure sensors are replaced, aren't they supposed to be resycned with the truck? Same as when they are rotated?

 

I apologize i replaced the wheel speed sensors sorry for the mistake.