well you read the title. i go up to auto zone today to get some oil and a oil filter and do a usual change. get my car up on the ramps drain the oil, unscrew the oil filter, put new filter on, oil it up, bring it back down and take the car around front of my house and i notice my speedometer isnt working! then to top it off the check engine light comes on! wtf? so im thinking i bumped a connector but ive been looking for the last 2 hours trying to figure out what the hell i did, and its still not working. anyone know what the hell is goin on?