My car is 07 na cobalt has 2 issues I can't figure out.

1. When driving between 40-50 mph car constantly upshifts then down shifts. If it is under 40 or above 50 no issues?

2. Driving down the road one day and door locks just started locking and unlocking repeatedly. Once this happened my door lock and unlock buttons no longer work. Every now and then put car in park and locks go crazy can hear clicking under the console like I'm stepping on break however I'm not. Won't stop doing this until I turn off car.

Any help will be appreciated.

 

I'm sorry to tell u this, but you have a ghost in your car.

 

Thanks lol. I just can't figure it out I'm hopeful someone here may have a clue

 

There seems to be a short somewhere.

 

just for fun disconnect ur ecu via taking ground off battery for 10 minutes then connect again, see what a reset ecu acts like

 

The locking/unlocking is probably a bad keyless remote. My car has done the same thing and it was the remote.

 

Good point. Leave ur keyfob in house and go start car and see if it does it