Coolant Temp Sensor Location

**40valve** · 10-20-2008 04:15 PM

Where is the coolant temp sensor located on 4.2L?
I followed the lines from the coolant tank but didn't see it anywhere below.
If there isn't DIY out there I can take pics as I go along. I know how to change it just need to know where it is on this engine. Thanks.

**40valve** · 10-21-2008 06:03 AM

Couldn't find any info for 4.2L but 3.0L layout looks about the same so this should be correct. Maybe someone else would need this as well.

**nimski62** · 10-21-2008 09:06 AM

Originally Posted by 40valve

Couldn't find any info for 4.2L but 3.0L layout looks about the same so this should be correct. Maybe someone else would need this as well.

Did yours go bad? (obviously it did, but what was the car doing that told you it was bad?)

**40valve** · 10-21-2008 09:39 AM

It's not bad yet but it is throwing a code which I don't have on me right now. I'll post it up later.

**40valve** · 10-21-2008 02:18 PM

19497 - Powertrain Databus: Implausible Engine Temp. Message from Inst. Panel
P3041 - 004 - No Signal/Communication - Intermittent

From my research it looks like bad sensor can do this. I've looked in car service history and that was never replaced before so it's a good place to start. Could be just a bad connection somewhere too. Should already have the green one but at $20 it's worth it.

**hackers4** · 10-21-2008 02:33 PM

I replaced mine and it was a pain. Takes a lot of patience.

**hackers4** · 10-21-2008 02:34 PM

And yes, that is the correct location.

**Justincredible** · 10-21-2008 03:52 PM

That is kinda where it is. The sensor is not located up and down like the pic for refrence. It is located above the trans bell housing more in between the cylinder heads.

As you can see it is in the upper right hand of the pic. The is taken from under the car with the Dp's removed. you are looking at the back of the motor. You can see the trans in the bottom of the pic.