Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, V8 Coolant Temperature Sensor Location? in Cadillac SRX Forums; I have a 2008 AWD V8 SRX and recently every time it rains, my temperature needle drops to zero, then ...
I have a 2008 AWD V8 SRX and recently every time it rains, my temperature needle drops to zero, then the display says the engine is too hot and kills the A/C. I can resolve this by disconnecting the battery for a few minutes after the rain stops.
I assume some connection is getting wet or the sensor needs to be replaced. I searched but cannot find a reference to it on the V8.
Temp sensors are thermistors. They never fail and then recover in my years working with them and when they do fail they will always indicate an extreme value as they develop a short or open internally. Sounds like you have a bad connection someplace that gets wet when it rains.
That picture is on the passenger side by the firewall? I'll have to look harder. I don't see how that location is getting wet though, I did notice water from the windshield is running under the plastic cowl on the driver side and down the firewall behind the fabric insulation in the engine compartment.
I located the sensor from under the car but could not get my hand anywhere near it without removing the drive shaft so, I coated the ends of the wires where they go into the connector with some RTV using a stick. We'll see what happens next time it rains.
Thank you, I'll start on this now. Hope all goes well and no engine P0119 codes.
Wow, this plug is it the top 1/4 inch tab that I lift off to disconnect? I have not familiar with this plug type and it looks like it has the one lock tab on the top. Please advise this will be my last plea for help. I just don't want to break the plug.
I just had the same problem as Xboxman72 today on my 2007 STS AWD V8. It wasn't raining or wet out, sensor wire looks good, instrument panel said engine hot, killed AC and defroster. So I searched this forum for answers and figured I should change coolant sensor. I bought sensor and was told it was an easy swap, by the thermostat housing they (Auto Value) said. I finally find sensor (I think, back of pass side head) but it looks like it will be a fairly involved process. I am guessing the whole right side plastic valve/spark plug cover has to be removed to access the very tight behind the head area. I finally did the disconnect battery terminal for a temporary fix and will do the swap another day. Did you (Xboxman72) or anyone else with this problem, resolve this problem and if so did you actually change the sensor?