Coolant temperature gauge

1. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #1 9th April 2010, 17:31

   My gauge stays dead at the bottom whilst in use. Initially as i start the engine on a cold morning the needle sits at the middle when it warms up it drops to minimum. Any ideas?
   
   For starters im not even sure which sensor is the coolant termpature sensor thingy. I took some pictures of colourful sensors:
2. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #2 9th April 2010, 17:36

   Top pic mate.
   
   Steve.
3. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #3 9th April 2010, 17:37

   which colour arrow is it?
4. grumpypants Regular Poster Joined: Jun 2009 Llantwit Major, Vale of Glamorgan Posts: 429 Vauxhall Corsa 1.0

   #4 9th April 2010, 20:21

   Picture 1:-Blue bodied sensor with one wire coming out (Green arrow) is the Fuel injection system coolant temperature sensor). The other one is I believe a wiring connector (Blue arrow).
   Picture 2:-Blue bodied sensor with two wires pink and green, is the Temperature warning light sensor (Red arrow). Yellow arrow not 100% sure.
5. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #5 9th April 2010, 22:22

   So the sensor with the green arrow is whats causing my wierd coolant temperature readings? Where can i get one of those? tried ebay and ecp but nothing
6. grumpypants Regular Poster Joined: Jun 2009 Llantwit Major, Vale of Glamorgan Posts: 429 Vauxhall Corsa 1.0

   #6 10th April 2010, 07:23

   No,the picture with the sensor with two wires coming out of it (Pink and Green) with the Red arrow. When you fit the new sensor, you may find that the ECU will require re-setting, but not always the case. You will know if it does as the fan stays on all the time even when the engine is stone cold. This is just a safety feature and a rip of to get more money out of you!! I managed to get one from my local motor factors, I think it was around the £15 mark.
7. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #7 10th April 2010, 09:30

   Quote:

   Originally Posted by grumpypants I managed to get one from my local motor factors, I think it was around the £15 mark.

   What exactly is the name of the sensor? i might pop in my local motor factors today.
8. grumpypants Regular Poster Joined: Jun 2009 Llantwit Major, Vale of Glamorgan Posts: 429 Vauxhall Corsa 1.0

   #8 10th April 2010, 21:04

   Coolant temperature sender/sensor unit.

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