Question about 1999 Volkswagen New Jetta

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How to replace a coolant temp sensor on a 2001 vw jetta 2.0

I need to find a diagram on how to replace the coolant temp sensor on 2001 vw jetta 2.0 I am getting confused regarding the sensor, I kepe reading it should be black (old?) or green(newer) (blue for TDI?) I have 2.0 gls (not tdi) and it seems like the sensor is actually blue. Does this mean I need the blue one? its a 1999.5 new jetta... Also, other information I have gathered on chaning the sensor show totally different instructions (more ocmplicated for vr6 and for the tdi?) it seems in this picture that I just need to remove the slip, unplug the sensor, put the new one, and plug the clip back.. is it really that easy?
I was driving my VW jetta the other day and it over heated. Drove it to my brothers and he replaced the thermostat thinking thats what it was. He let it sit for a while and it didnt overheat. Later he took it for a drive and it overheated right away. There is no smoke or anything. We got the diagnostic ran on it and the code P0117 came up. They let the car iddle and it said it was over heating rigth away. Obviously we have to get all the air out of the cooling system but is the sensor the reason my car says it is overheating?

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YES & IT REALLY IS THAT EASY

Posted on Feb 18, 2009

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SOURCE: how to replace a coolant temp sensor on a 2001 vw jetta 2.0

Yes it is that easy. It should be a 4 pin connector located on the transmission side of the engine head in a plastic flange. Best is to wait for the engine to be cold. Unscew the radiator cap to relieve pressure but screw it right back on. On the 2.0L engines when you unclip the coolant sensor little or not coolant loss will happen if you do this. Just unplug it, pull out the clip, pull out the sensor, and the seal which sometimes stays stuck. Install the new sensor with a new seal lubricated with some coolant, make sure it's well seated and reinstall the clip. The sensor is well seated if the clip fits right over the top, just make sure both sides clipped into position. Replug it fill the coolant with VW original coolant mixed 50-50 with water if needed and done. If you have a fault you might need a scanner to erase the check engine or fault in the cluster.

What's the reason for changing it? Eratic temperature readings?

Posted on Nov 29, 2008

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tdisline_485.jpg




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tdisline_486.jpg

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4b3512b.jpg


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9ce325e.jpg

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Please rate/vote! Thanx!

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How to replace a coolant temp sensor on a 2001 vw jetta 2.0


Yes it is that easy. It should be a 4 pin connector located on the transmission side of the engine head in a plastic flange. Best is to wait for the engine to be cold. Unscew the radiator cap to relieve pressure but screw it right back on. On the 2.0L engines when you unclip the coolant sensor little or not coolant loss will happen if you do this. Just unplug it, pull out the clip, pull out the sensor, and the seal which sometimes stays stuck. Install the new sensor with a new seal lubricated with some coolant, make sure it's well seated and reinstall the clip. The sensor is well seated if the clip fits right over the top, just make sure both sides clipped into position. Replug it fill the coolant with VW original coolant mixed 50-50 with water if needed and done. If you have a fault you might need a scanner to erase the check engine or fault in the cluster.

What's the reason for changing it? Eratic temperature readings?

Nov 28, 2008 | 1999 Volkswagen New Jetta

2 Answers

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here is a picture of where it's located on your jetta:

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