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I need help with coolant temp sensor #245233
October 17, 2007 12:22 am UTC
October 17, 2007 12:22 am UTC
Joined: May 2007
Posts: 106
ontario
Ben Kalinowski Offline OP
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Ben Kalinowski  Offline OP
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ontario
Hi .
I have code 21 currently on my 90 talon tsi.

it is the coolant temp sensor.

Here is my question. On the them. housing there are 3 sensors.

1. at top by rad cap? sensor has female end.2 prong
2. under top sensor ? sensor had male end 2 prong
3. Little one at bottom that runs the temp guage.

which one is the coolant temp sensor 1 or 2?

let me know thanxs!

Re: I need help with coolant temp sensor [Re: Ben Kalinowski] #245263
October 17, 2007 05:43 am UTC
October 17, 2007 05:43 am UTC
Joined: Apr 2002
Posts: 15,322
Loc: Loc:
Rob Strelecki Offline

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Rob Strelecki  Offline

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It's the one that has the 2 wires, yellow & green.


1993 Eagle Talon TSi FWD
13.8 @ 106 :::: 14.1 @ 117
Re: I need help with coolant temp sensor [Re: Ben Kalinowski] #245271
October 17, 2007 11:47 am UTC
October 17, 2007 11:47 am UTC
Joined: May 2007
Posts: 106
ontario
Ben Kalinowski Offline OP
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Ben Kalinowski  Offline OP
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Joined: May 2007
Posts: 106
ontario
ok, so what in the world does the other sensor do then?

if you unplug them one by one they both set code 21
weird?

Re: I need help with coolant temp sensor [Re: Ben Kalinowski] #245295
October 17, 2007 06:10 pm UTC
October 17, 2007 06:10 pm UTC
Joined: May 2000
Posts: 2,637
NiagaraFalls, ON
Paul Bratina Offline
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Paul Bratina  Offline
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Posts: 2,637
NiagaraFalls, ON
The 2-pronger up high (just under the rad cap) is a switch/sensor for the a/c.


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