mazda truck issues
 

I have a few questions and quorks with my truck.

first off when its cold out (I live in NB canada) the speed odomoder wont work until it hits a sertain speed, for example 70 km/h the colder it is the longer it waits to work. when its mild out it works from like 30 or 40 km/h

secondley when its cold my drivers side door sensor works up. if i hit a bump on the road or anything it says the door ajar. light stayes on and it will turn off if i hit another bump or try to shut it.


and would there be anything i should keep my eyes out for or any known problem with these trucks? I have had mine since this past october.
its a 2 wheel drive extended cab.

i have a 2001 mazda b4000 and im having the same issue with my passenger door sensor but it doesnt happen all the time.