WHAT IS CAUSING A COOLANT TEMPERATURE GAUGE MALFUNCTION?

  • Tiny
  • donaldp8934
  • 1997 Nissan Hardbody
  • 130,000 miles

The gauge is reading hot quickly and bounces around rapidly. I replaced both of the coolant temp sensor/sending units, nothing changed. I checked the gauge, unplugging it reads cold and grounding it reads hot. The engine is not getting hot, the radiator cap is brand new.

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Saturday, July 7th, 2012 AT 7:30 PM

3 Replies

  • Tiny
  • rasmataz
  • Member

Check/Test the thermostat if okay-could be airlock try bleeding the cooling system and see what happens-let me know

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Saturday, July 7th, 2012 AT 7:57 PM
  • Tiny
  • donaldp8934
  • Member

It was also replaced same time as the coolant temp sensors. Just drove it, the gauge needle move along with any electrical devices, it moves up/down with the blinkers simultaneously, up/down with heater fan on/off, head light also. Must be a ground short, will run a new wire.

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Saturday, July 7th, 2012 AT 8:03 PM
  • Tiny
  • rasmataz
  • Member

I'll be waiting

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Saturday, July 7th, 2012 AT 8:07 PM

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