no. no relation at all
Yes if one or more gauge is reading wrong
Replace sending unit
The thermostat is the most likely cause, other than that the temp sensor could have failed sending the wrong temp reading to the gauge.
Yes, tires that are larger or smaller in diameter than original factory size will cause a car's speedometer to be wrong.
If the outside temperature gauge is not reading the right temperature on a Buick Regal, perhaps it has become damaged. It can also not read the right temperature if it is wet or covered with dirt or snow.
Your fuel gauge is probably reading incorrectly because of a bad fuel level sending unit. There is an access hole for it in the trunk or under the back seat. It is easy to replace and not very expensive.
Check your oil pressure gauge, if your just going by what it says the gauge might be wrong Iv had this happen bout 4ish times and its always the tube running to the oil pressure gauge is pinched so its not getting a good reading.
wrong
No, but a defective fuel cap can set the "check engine" light to come on.
2004 Chevy trailblazer is reading wrong passed 120mph
Speedometer gives a wrong reading for Yukon XL 2003?
A reading error is when you accidently read something wrong :)