Question about 2001 Volkswagen Beetle
It shows blue when its cold, does that mean it should be red if its running hot?
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Posted on Jan 02, 2017
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
fan relay is under the frame on the left by the fans. but most likely the fans themselves have gone bad check the fuse panel on top of the battery see if it is burned or blown fuse this is caused by the fans going from stop to high speed to many times. you will flat 40 or 50 amp flat blade fuse and both fans sorry for bad news
Posted on Sep 01, 2009
the coolant temp sensor is by far the most common fault.the only other thing it could be is the sensor in the coolant header tank.if you disconect the 2 pin sensor from where you top the coolant up and bridge out the 2 pins in the connector with a bit of wire.if this cures the fault you know its the coolant level sensor.if it persists and its straight from a cold start then the coolant temp sensor is the most likley cause.hope this helps.
Posted on Feb 04, 2009
Coolant is low enough to trigger the sensor. There's a pressure leak somewhere in the system. The sensor is faulty.
Posted on Sep 14, 2009
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