Temperature gauge-cooling fans

2001 PONTIAC GRAND AM
147,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
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KJ1211
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  • 2 POSTS
Temperature gauge inoperable. I replaced coolant temperature sensor still not working. Disconnect battery cables hold together for two minutes reinstall cables. Check engine light out gauge works. Day later, driving for an hour or so gauge is fine gauge then drops to zero and as soon as that happens both cooling fans come on and run continues until I turn key off. Is this what I suspect a PCM issue? Code was 0480.
Thank you,
Kenny
Aug 6, 2017 at 7:44 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
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Hey Kenny,

Yes, you got it on the money we had another user report the same thing a few months back, it was the ECM. Here is the location of the ECM (below):

Please let us know what you find.

Cheers, Ken
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Aug 7, 2017 at 2:29 PM
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KJ1211
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Thank you!
Aug 7, 2017 at 3:00 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Please let us know what happens.

Cheers, Ken
Aug 8, 2017 at 1:18 PM
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