My 850 starts instantly if cold, or if hot, but if I start it and drive a mile and shut it off, it won't: Doesn't engage, no click, no nothing. Other electrical functions, lights, radio etc., not affected. Been this way for over a year. If I drive downtown to the postoffice or coffee shop I have to leave it idling. After it has idled another 15 minutes it is okay and will start instantly again.

 

Hi and welcome to the forum.

Try this and please let us know if it helps.

 

Unfortunately that could be any number of things:

1. bad starter or starter solenoid (part of starter)
2. bad or mis-adjusted PNP switch
3. bad ignition switch
4. loose battery connections
5. something else..

The weird part is the relationship to temperature; the only one of above that might have a correlation to temperature would be #1. But this is all a WAG; need to get in there and diagnose it.

 

Coolant temperature sensor bad??

 

Inaccurate coolant temperature wouldn't disable the starter.

 

Sorry, missed the part of no starter function.....Thought it would crank but not start.