Question about 2002 GMC Envoy XL
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Posted on Jan 02, 2017
That code represents a lower than expected reading for temperature (coolant). First thing to do is check your coolant level, as if it is low, then the sensor can not read correctly. Second, you may have a thermostat that is stuck open, allowing the coolant to cool off too much. The sensor should be mounted on top of the engine, near the thermostat housing.
Posted on May 18, 2008
SOURCE: ECT Sensor location on MPV 2003
Find the thermostat housing a little left of the bottom of the battery base plate. It is a junction point of three coolant hoses. Then, diagonally to the upper left about 2.5 inches you'll find the L-shaped sensor. Unclip the wire feed from the top part of the sensor. Then turn the piece to the left and pull it out. Have the other one ready quick as coolant will come out fast so place a catch basin under the car to catch the coolant. I just did mine an hour ago and it was easy.
Posted on May 12, 2009
heres a diagram to show you where the coolant temp sensor is located, its behind the alternator on the left side (driverside),the sensor just unplug the connector and then unscrew it and out it comes.
Posted on Jun 21, 2010
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