Hi all;

The ambient temperature gauge on my dash (2004 f-150) is pegged at 140 degrees. I tried to find the location of the sensor in my Hynes manual but, it doesn't list it. I think it's located in front of the radiator. Is there a way to test this or do I just need to replace it? Anyone know what the cost is?

Thanks;

Jake....

 

I don't know about testing it, but I think that the sensor is the on that vertical beam in front of the radiator.

 

The location is correct. There are 2 sensors on the beam in front of the radiator.
It's the upper one! The one without the barcode!

I replaced my to clean it because it showed the 140F too, but it didn't worked out

I guess I have to buy a new one, it's about 50 bucks...

Tell me if you found out something else OK?

Bye

 

Is it the round one with the little thing sticking up from the top?

 

I hope this works.. It's the one looking like a screw!

 

what is the other sensor for?

 

To confuse it with the water temp sensor used by the cluster gauge.

I believe they are both engine temp sensors; one is used by the cluster gauge, the other is used to send a signal to the PCM (power control module) so it knows the engine is cold (for "cold startup" fuel enrichment) or warm (disable "cold start" enrichment).

To be 100% sure, I'd need my repair book to verify the location. Every engine has a sensor for a PCM, and I doubt the share the same one to drive both circuits (cluster gauge and PCM).