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Temperature gauge-cooling fans

Tiny
KJ1211
  • MEMBER
  • 2001 PONTIAC GRAND AM
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 147,000 MILES
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
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Sunday, August 6th, 2017 AT 7:44 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
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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Monday, August 7th, 2017 AT 2:29 PM
Tiny
KJ1211
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Thank you!
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Monday, August 7th, 2017 AT 3:00 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Please let us know what happens.

Cheers, Ken
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Tuesday, August 8th, 2017 AT 1:18 PM

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