Temp Sensor not working

[Kevin01]

This started yesterday, noticed it after about 10 min on the road. I believre it was working when I first left my house in the morning.

The temp guage on the dash reports below 100 degrees. When I was driving home last night the SES light came on. I replaced the coolant temp sensor under the throttle body this morning. But still doing the same thing. Other thing I noticed the radiator fan is always on now.

This is on a 2001 Camaro 3.8L

Anyone have any ideas?

[CDNFB]

Re: Temp Sensor not working

I would suspect the fan relay is stuck. Pull the relay from the relay center under the hood and see if the fan stops and if your temps get better.

[Kevin01]

Re: Temp Sensor not working

Got it figured out I reset the PCM and all is good now.

Kevin

[airattack111]

Re: Temp Sensor not working

Same thing happened to me today, how do you reset the pcm?

[Crazed98Camaro]

Re: Temp Sensor not working

I believe he prolly just left the battery unhooked for about 20 mins or so, and that would reset the PCM, but I could be wrong.

[Kevin01]

Re: Temp Sensor not working

That is one way to do it, How I reset mine was pullinbg fuses. Somoene posted this here a while ago.

Turn iginition to ON (Do not start engine)
Pull PCM IGN fuse
Pull PCM Bat Fuse
Wait 5 min..
Turn ignition off

Put fuses back.

Start engine.

Check everything. You are all set.


After I replaced the sensor, I got my volt meter checked resistance on the temp sensor with a lighter.. I do not know exact values should be but could tell by useing a lighter the resistance changed. I also checked voltage from the wires leading to it. One should bre 5 volts, other should bre less then a volt..