Recently my drivers side door lock doesn't always allow me to turn the key.
It can take multiple attempts. Is their a cleaning product that might be used
so coded locks and keys work better? The other door works normally.

 

Graphite lube might help, but key or cylinder might be too worn to put all the pins in correct positions

Could also be the door latch and lock mechanics, not the lock cylinder, need to pull it out to find out which it is

Locksmith can setup a new cylinder to match your key, if cylinder is the problem

 

I'll check this out. Thanks

 

There are so many ways through which you can repair your ranger door locks but cheap option is to get it repaired from a locksmith.