Temperature malfunctioning unit/censor?

-I was just wondering if anyone has had one of these go out on a small car, and if so, what signs the car showed that it was out.

I have an 05 dodge neon, and a friend told me he thinks that went out, and i was wondering what signs a car would have if one went bad.Coolant-Temperature Sensor - Symptoms

Emission Problems

Increased Fuel Consumption

SYMPTOMS WHEN COLD:

Car will not start on its own. Needs throttle in order to start.

Car will die at any speed if throttle is not maintained.

Idle can be achieved by "feathering" throttle, but only lasts for a few seconds before stalling.

CES light intermittently turns on and off, but this does not happen very often.



SYMPTOMS WHEN CAR IS WARM:

High idle (1250-1500 in drive). Car will accelerate from 25-40mph on its own, no throttle needed.

While rolling, putting car into Neutral causes idle to raise to ~2500 RPM.

When slowing down, car will maintain a high idle until speed reaches ~3 mph, then idle suddenly drops to ~500 RPM.



Intake Air Temperature Sensor - Symptoms

Spark Knock

Poor Fuel Economy

Extended Crank Time (when cold)
Sensor? Yes, Neon's did have a bad run of coolant level sensors (attached to over flow tank, 2 wires). Not to say the cooling temp sensors didn't have problems. Then you have the IAT sensor (idle air temp), that one will give you hard extended cranks, raw fuel smell, no start, black smoke, run like crap, not rev up. If you just had car serviced check it 1st, we love to leave that one disconnected or barely plugged in.