Can a bad coolant temp sensor cause the car to not start?

Hope your pal "Lester" can swim as he is drowning in his own BS. You heard wrong! An engine doesn't even need an electrical temperature sending unit to start an engine. Have you checked the fuel pressure at the fuel rail? Is there any ignition fire at the plugs while the motor is being cranked?

You need to quit replacing parts and start testing before throwing money away on parts that are probably working just fine.

Have your computer codes pulled for starters, then start testing.

Get on the internet and just type in "how to test ________" whatever, and you'll get the information you need to test before replacing.

And yes, a bad coolant temperatue sensor can cause starting problems, but so can many other things.

This is why it's critical to test before replacing anything.

A continuity tester and multimeter will go a long ways in helping your diagnosis.

Yes a bad coolant sensor can make the car run rough or not start.

DO NOT listen to this country boy asshole my car wouldn't start and when we fixed the sensor it has been fine since

try the crank sensor, not the coolant sensor.

You can check that sensor with a ohm meter. I would look towards cleaning the throttle body first.

i have a ford fusion 2003 semi auto

plugged catalytic converter maybe?