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Old 03-04-18, 05:53 AM   #1
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Default Peugeot 106 1.1i XN Zest 2000 reg

Hi all,

There are 2 sensors, see pic below.

There are 2 sensors on the passenger side of the engine, I think the green one is the coolant temp sensor, as it has 2 terminals. The blue one only has one terminal, any idea why that is or what it is for would be of great help.

TIA.

Last edited by JohnJ; 03-04-18 at 09:48 PM. Reason: Photo added.
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Old 03-04-18, 05:33 PM   #2
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Apparantly the green one is for the ecu, so it can to mix the fuel properly
and it's resistance halves every 20C


and the blue one, is an on/ off, turns on at 118C to illuminate the
"bloody hell it's too hot" lamp on the dashboard

Liam
ps
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greeny.jpg  
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Last edited by lammcl; 03-04-18 at 05:38 PM.
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Old 03-04-18, 05:59 PM   #3
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[quote=lammcl;2117025]Apparantly the green one is for the ecu, so it can to mix the fuel properly
and it's resistance halves every 20C


and the blue one, is an on/ off, turns on at 118C to illuminate the
"bloody hell it's too hot" lamp on the dashboard

Liam
ps

Thanks for the reply Liam, is there a name for this sensor.

The thing is, it only has one connection pin but the the plug that goes on to it has two terminals. I was thinking that it is knackered because it is missing one connection pin.

If I could post a pic, you would see what I mean.
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Old 03-04-18, 06:47 PM   #4
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[IMG][/IMG]

The pic is upside down, better than nothing I suppose. The green sensor is on the left if the pic was the right way up. If you look at the blue sensor, one of the pins is missing. If you look at the blue plug, it has 2 wires in the back of it, logic tells me something is not quite right here. Or maybe that is how it should be.

What is the blue sensor called, should it have 2 terminals, like the green sensor.
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Old 03-04-18, 06:55 PM   #5
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The blue sensors generally only have 1 connection it is simply an on of switch

Blue sensors have various functions based on what the car has it controls aircon cooling fans and the too late light but only need 1 contact in most cases as it earths to the engine
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Old 03-04-18, 07:13 PM   #6
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Quote:
Originally Posted by reliable406 View Post
The blue sensors generally only have 1 connection it is simply an on of switch

Blue sensors have various functions based on what the car has, it controls aircon cooling fans and the too late light but only need 1 contact in most cases as it earths to the engine
Thank you, I thought something was broken for a minute and couldn't find any ref to it in the Haynes manual.

I shall call it the one legged sensor thingy.
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Old 03-04-18, 10:53 PM   #7
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Quote:
Originally Posted by JohnJ View Post
[IMG][/IMG]

The pic is upside down, better than nothing I suppose. The green sensor is on the left if the pic was the right way up. If you look at the blue sensor, one of the pins is missing. If you look at the blue plug, it has 2 wires in the back of it, logic tells me something is not quite right here. Or maybe that is how it should be.

What is the blue sensor called, should it have 2 terminals, like the green sensor.

on ebay , they call them upper and lower (some times)
or just green coolant sensor, and blue coolant sensor
and for mine ... the green is peugeot code 1920.k0 and the blue 0242.86
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Last edited by lammcl; 03-04-18 at 11:26 PM.
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Old 03-04-18, 11:18 PM   #8
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Quote:
Originally Posted by lammcl View Post
The blue sensor is peugeot code 0242.86

The green sensor

on ebay , they call them upper and lower (some times)
or just green coolant sensor, and blue coolant sensor
Thanks for that, the code is handy to know in case I need to replace it.
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