Question about 1996 Saturn SL

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Erratic temp guage but not overheating

Temperature gauge is bouncing from 1/4 to the H and back again, but vehicle is apparently not overheating. Any idea what could be causing this and is it an expensive fix?

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  • Saturn Master
  • 2,019 Answers

Probably the sending unit, and cost about $30.
The test of the gauges is to remove wire from sending unit and watch gauge go to lowest, then ground the wire and watch it go to highest.
If it does, then not a problem with gauge. So must be sending unit.

Posted on May 13, 2010

  • Phil Helms
    Phil Helms Aug 20, 2011

    i also have the same problem my gauge even when i first crank up car while cold, the gauge is all the way up like it is over heating but is not!also when i turn car off the fan stays on like it is over heating!!

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