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Temperature gauge reading a bit low?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Temperature gauge reading a bit low?

Post by Richard99 » Sun Mar 22, 2020 5:44 pm


Ever since I bought my 2000 V70XC the temperature gauge never quite gets to the 3 o'clock position. It always stops right between the 3 o'clock mark and the mark below that (see photo). It never fluctuates but always comes just shy of the 3 o'clock mark. And in case you are wondering, I am 100% sure the engine is all the way warmed up.

I'm not sure if this is normal on this year/model. I just know that when I had my 98' V70 it would always go to exactly the 3 o'clock mark on the gauge.

The question I have is: Should I be looking to replace the ECT sensor?



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2000 Volvo V70XC

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Re: Temperature gauge reading a bit low?

Post by RickHaleParker » Sun Mar 22, 2020 6:05 pm

Richard99 wrote:
Sun Mar 22, 2020 5:44 pm
The question I have is: Should I be looking to replace the ECT sensor?
It could be oxidation creating a high resistance on the ECT electrical connector. Considering that the car is 20 years old it a good probability. Try cleaning the ECT electrical connector with MAF cleaner or Electrical contact cleaner.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
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Re: Temperature gauge reading a bit low?

Post by abscate » Sun Mar 22, 2020 7:21 pm

You can think of the gauge as a stop light , three colors

Cold, ok, overheat

In one of my threads I documented the temperature and gauge position for one of my cars, I’ll search

Found it, it was the T5

viewtopic.php?f=1&t=88486&p=497390&hili ... re#p497390
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Re: Temperature gauge reading a bit low?

Post by ecbsykes » Sun Mar 22, 2020 9:28 pm

I would try a new thermostat as they're cheap and easy to replace. If that doesn't work, new OEM ECT wouldn't hurt, especially if it's original. Your temp doesn't really look bad though.

My 2000 XC is always right at 3 o'clock position.
2000 V70XC - 295,000 miles
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