Red07Coupe

Here is what my car is doing;

- When I first turn it on, could be in the morning or after I've been driving it for a bit, the fan comes on (A/C is off)

- The coolant temp indication on my DIC still operates and indicates a normal cooling condition.

- When a friend of mine recently connected his HP Tuners, the car constantly indicated an overheat condition (I think around 120 degrees)

- The car dosn't appear to be overheating

- The I/C pump appears to be working because I can feel coolant flow through the lines of my OTTP heat exchanger.

Alldata DIY says its the (ECT) Engine Coolant Temp. Sensor, but my dad, who is a mechanic, thinks its the thermostat.

Anyone else ever have the same kind of problems?

Thanks in advance for any advice or help.

HunterKiller89

iTrader: (1)

im confused. what is the actual problem? just what the HPT scan is saying? and you said an overheat condition, and then posted 120*...which is definitely not overheating

Bad05SS

same thing im going through my car been at the shop for a week now so good luck

SSJit

hey bro im having the same problem.. my fans stay on even when the key is on but the car isnt running.. i changed the ECT sensor and that didnt do a thing.. someone else had the same problem also and he told me that he replaced his thermostat and that fixed it.. sounds weird but i guess if the computer finds a problem with the thermo, it automatically kicks the fans on as a safety precaution..

Red07Coupe

Thanks man, I'll try replacing that first. I'll let you know how it goes.

SSJit

did u ever get a chance to change out that thermo man??

wtpcobaltss

coolant temp sens is bad..its happens alot to most gm vehicles..i doubt its the thermostate other wise u would have a high reading and the car wouldve overheated by now...but to be on the safe side dont be hard on it.

Red07Coupe

No I haven't, Waiting till next week.

And if the coolant temp sensor is bad you would think that the indication givin by the DIC would not be functioning. I dunno, I'll probably replace them both

G85 SS

I'm guessing you have a bad thermostat.

Red07Coupe

Ya same here

SSJit

ya man like i said i changed the sensor and it didnt do a thing to stop the fans.. relays are good too..so im still gonna have to change out the thermo n see what happens.. it looks like such a pain to do.. im gonna wait till i can get ahold of a lift n do it on there

2006superchargedss

old thread but what was wrong in the end if you remember ?

Red07Coupe

The I/C pump turned out to be intermittent, the cars lease comes due in December so I'm not going to bother fixing it.