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Replaced ECT but wondering if I replaced the wrong one?

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Old 02-13-2006, 07:26 AM
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Default Replaced ECT but wondering if I replaced the wrong one?

I recently did the ECT swap. I replaced the one infront of the radiator but when I pulled it out, it was blue and looked slightly different than the green one I bought. Was this the right sensor I pulled or is there another one that I was supposed to change. I've read that there are two but haven't seen any clear info as to which one I was supposed to change.
Old 02-13-2006, 07:30 AM
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Default ECT is not in front of the radiator...its underneath the MAF sensor!

The Green one is correct...if you see a black one, not to worry...the green one is the updated ECT
Old 02-13-2006, 07:33 AM
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the one behind the radatior is the afterrun coolant sensor, not the regular coolant sensor
Old 02-13-2006, 07:35 AM
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its not "the" afterrun coolant sensor, but it is part of the fan/cooling system.
Old 02-13-2006, 07:54 AM
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Default So should I put the blue one back in? I don't want to screw my car up...

I also read that the after run coolant thermal switch is under the coolant reservoir. Is that correct? I want to replace that one as well so that the after run pump runs more often.
Old 02-13-2006, 09:09 AM
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Default read this...

<ul><li><a href="http://www.modifieda4.com/web/archive/SSP%20198%20-%20Audi%20S4%20Engine%20(english).pdf">it tells you where all the sensors are, and yeah i return to stock what you changed.</a></li></ul>
Old 02-13-2006, 09:43 AM
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Default I may be a bit retarded but that thing is a bit confusing....

It didn't show me where the G62 sensor is located. I showed where the Thermoswitch is (below the coolant reservoir). It also doesn't tell me what sensor I actually removed.
Old 02-13-2006, 10:21 AM
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page 9 is pretty clear to me.
Old 02-13-2006, 10:33 AM
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Default Thanks dude, I was trying to find it in the pages with the front, rear, side engine views....

Hopefully this will finally clear the CEL that keeps coming back.
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