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Should I install an OBD gauge

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I have a 2013 Mazda 3 that has no temperature guage, just a tempurature indicator: cold (blue), normal (off), and hot (red). How important is it to have a guage?

I found you can buy a temperature guage that reads the OBD port. Is it worth buying? I've heard Scotty say it is bad to have a device plugged into the OBD port for long periods of time.

Any insights?

3 Answers
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Certainly a gauge would be better than the lights, however I would not leave anything permanently plugged into the OBD2 port. As Scotty has said that port is designed for diagnostic purposes, not for continuously running 3rd-part equipment.

 

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Posted by: @galabonic

has no temperature guage, just a tempurature indicator

https://www.thecarconnection.com/news/1056051_why-does-my-new-car-have-no-temp-gauge

Posted by: @galabonic

How important is it to have a guage?

As long as the overheat dummy light illuminates when the key is in the ACC position, I wouldn’t worry about it. Also, if you use the AC all the time, you’ll notice it suddenly won’t blow cool air if an engine overheat is imminent. That’s your first cue to start getting suspicious. 

I’ve driven cars without temperature gauges for decades and even had one overheat (with the red temp lamp glowing). You’ll be fine, as long as you scan the gauge cluster every few minutes or so.

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Posted by: @galabonic

I found you can buy a temperature guage that reads the OBD port.

What did you find?

KONNWEI KW206 Car OBD2 HUD Digital Meter Gauge All in One Automotive Trip Computer Smart OBD Speedometer Water Temperature Fuel Pressure Tester for All 2003 and Newer Cars https://a.co/1Bj5JTE

no, I would not install this Chinese garbage in my car.

Something like Scangauge, UltraGauge, DashDAQ etc is OK

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