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Old 09-11-2012, 01:15 AM   #1
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Temperature Guage Problem

Hello all I'm new to the forum, my 2000 986 2.7 has recently developed a problem with the temperature gauge the needle dose not move at all the car is not over heating the coolant level is fine and there are no fault lights on the dash ! any ideas you input would be much appreciate.
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Old 09-11-2012, 01:30 AM   #2
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If the car is operating and running normal, it's likely either the gauge itself, a broken or otherwise compromised wire or the pickup sensor.
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Old 09-11-2012, 01:50 AM   #3
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Thankyou for the response . Where would the pickup be located ? i'll try fitting a new one if that dosn't work then i'll try a new gauge .
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Old 09-11-2012, 02:32 AM   #4
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That's an excellent question, to be a board buddy I retrieved my Bentley manual to check for you. Section 19-2 shows the entire cooling system and I see no pickup. I wonder if the thermostat includes the sender? Doesn't look like it does. Maybe someone else will chine in here, in the meantime I'll keep combing the book and jump back in if I find it for you.

Last edited by Ghostrider 310; 09-11-2012 at 02:34 AM.
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Old 09-11-2012, 02:37 AM   #5
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All we need to do is find this: maybe the block, I'm looking

Porsche 99660641000 Temperature Sensor | Compare Prices

found it! 24-8 in Bentley book at coolant manifold, left front engine near cylinder 4 there is a big ass hose right next to it, must be done from underneath car

Last edited by Ghostrider 310; 09-11-2012 at 02:41 AM.
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Old 09-11-2012, 03:25 AM   #6
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Thankyou for taking the time to look for me i'll have a look later just need to free up a ramp so I can get it in the air. niceone bud !
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Old 09-11-2012, 03:29 AM   #7
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As long as you are going to check it take it apart, check for corrosion, lubricate the connection with pb blaster or equivalent. Even a blind squirrel finds a nut now and then, I fixed the Fiat alternator using the method described above. good luck!
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Old 09-11-2012, 05:35 AM   #8
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I know this is not much help but, looking at the wiring diagram tells me that the temperature sensor is in the engine bay with four wires attached. Assuming your car is a 97-99 the wires are brown/orange, blue/red, blue/white & brown/pink. My guess is that it is plugged into the block itself.

Sorry I can't be more specific. I must have disconnected once or twice but I just don't remember.
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Old 09-11-2012, 01:35 PM   #9
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What I transcribed was direct from the manual, including the underneath the car comment, not sure if it can be done other ways.
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Old 09-14-2012, 06:49 AM   #10
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HAHA ! problem solved thankyou guys, the wire to the sensor was loose I love those sort of repairs !
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Old 09-14-2012, 06:57 AM   #11
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So for my information where was the sensor?
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Old 09-14-2012, 10:59 AM   #12
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Coolant temp sensor is on the coolant manifold side behind the drivers seat. Easy to replace thru the behind the seat access panel, although you need to catch escaping coolant while the sensor is out. Photo
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Old 09-17-2012, 06:58 AM   #13
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its a bit tight to get to from under the car but i only had to push the wires back on I think if I have to change it at somepoint then BYprodriver's advice would be the way to go there is no way without taking all the bottom pannels off the car of getting to it easly cheers guys.
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