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1998 Pontiac Sunfire Engine Cooling Fan

Tiny
EKW940
  • MEMBER
  • 1998 PONTIAC SUNFIRE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
My '98 Sunfire's engine cooling fan is turning and staying on for about 5 minutes after the car has started and then shutting off. The Relay is good, and I have replaced the Coolant Temp Sensor, which when the gauge chord is unplugged from the sensor, the fan will turn on and run until I plug it back in and then shuts off, even whenever the car is Extremely hot.
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Tuesday, June 29th, 2010 AT 1:19 PM

4 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Does the sensor replaced have two wires yellow and brown? If yes then suspect PCM fault
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Tuesday, June 29th, 2010 AT 2:59 PM
Tiny
EKW940
  • MEMBER
  • 3 POSTS
The plug that runs into the sensor has a yellow and brown wire that connect to the actual plug, but not to the sensor itself.I mean the fan will come on when this is unplugged, and if the AC is on, just not whenever the sensor itself is telling the gauge that the far is way hot.
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Tuesday, June 29th, 2010 AT 3:15 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Need OHM meter check ohms across wires at terminal to ECT
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Tuesday, June 29th, 2010 AT 3:24 PM
Tiny
EKW940
  • MEMBER
  • 3 POSTS
I wonder, I didnt drain some of the coolant, nor did I disconnect the battery whenever I replaced the sensor, do you think that would have anything to do with it?
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Tuesday, June 29th, 2010 AT 3:28 PM

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