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Check "Coolant" Light is on and the coolant is fine
SOURCE: im receiving a check coolant
No the light is linked to a sensor. There is a coolent sensor that tells you that the level is low. It sounds like the sensor has gone bad. And the sensor is located in the coolent tank. If it is bad from my understanding you have to replace the whole tank. But take a paper clip with the engine off and disconnect the wire harness from the sensor and jump the wires and see if the light goes off.
Posted on Jan 20, 2009
With the key in the ignition (but not turned), press and hold the Odometer Reset Button on the right hand side of the panel. While still holding that button, turn the key (although not far enough to start the engine) and then press and hold the Minute button on the left side of the instrument pane(if pressing doesnt work try turning the knob clockwise until service light has gone off and skip the pressing)l. Release both buttons at the same time.
Posted on May 30, 2009
There's a level sensor plugged into the bottom of the coolant reservoir. Unplug it and clean the contacts with electrical contact cleaner. If that doesn't do the trick, replace the sensor.
Posted on Dec 01, 2009
SOURCE: need exact location and picture
The exact locations and picture of Engine Coolant Temp (ECT) sensors on 2004 VW Jetta TDI:
1. ECT sensor 1 placed on cylinder head:
2. ECT sensor 2 placed on the left bottom side of the radiator:
Posted on Sep 22, 2010
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