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Old 09-24-2012, 11:41 AM   #1
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Ugh HELP -- temperature sending / sensor

Following a rad leak (and possible brief overheat lasting seconds only) ... my coolant temperature gauge went out -- suddenly stopped working and now does not work at all. Rad fans come on with a/c switch, not otherwise (fwiw, I needed to replace a bad radiator resistor to get the left side fan to work).

I have replaced the coolant temp sensor with no effect.

If its not the sensor what could it be? Help ... supposed to leave with this car on a trip in 1.5 days.

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Old 09-24-2012, 11:53 AM   #2
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Sounds like you may have an air pocket in the system.............
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Old 09-24-2012, 12:17 PM   #3
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I replaced a rad (with flush and bleed) .... But If there is some way to test / remedy please let me know???
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Old 09-24-2012, 12:19 PM   #4
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Have you driven the car with the bleeder open. I changed my tank a week or so ago and have had the bleeder open since. I may close it soon. Good luck.
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Old 09-24-2012, 12:44 PM   #5
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Would this cause total gauge failure???
Any way to confirm?
Any other possibilities other than sensor (already replaced)
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Old 09-24-2012, 01:40 PM   #6
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If the air pocket is where the sensor is, yes........... You could also have a wiring problem, but that should be easy to test.

Best way to prevent air pockets is vacuum filling the system.
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Last edited by JFP in PA; 09-24-2012 at 02:30 PM.
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Old 09-24-2012, 06:43 PM   #7
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hmmm ... somebody (i.e. wrench, not me) did not clear the obd code (there was no cel, you needed to plug in to read it ... p0015 i think). fortunately i figured that out before spending a bunch more dough on a 2nd wrench. temp gauge is now working.

a relief, needless to say.

i've got the bleeder valve open now ... is there any risk to driving it with the bleed open? how long should I leave it open for (both in days and miles if there is a reason to close).

all seems to be fine now ... is there anything else i wanna do to test before leaving on a long road trip?

thanks for all the help.

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