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Also temp gauge stays low - would open thermostat trigger management light?

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  • Cars & Trucks Master
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You bet. Engine running too cold makes computer think you need rich fuel mix (think choke on old school carb systems). Modern injected engines must run at correct temp. Note: if engine is really warming up normally but gauge is wrong that's a whole different deal.

Posted on Dec 12, 2014

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If thermostat is stuck open will it make your engine cooling fan run constantly?


im assuming your speaking of the engines internal thermostat ? if this sticks open (not likely) then temp gauge on car will never reach operation temp and stay low on scale ( entire purpose of thermostat in first place) now if your coolant fan switch sticks closed (very likely) then your fan will run constantly and only shut off with the key


also another condition that makes them run more often is that engine temp gauge is over normal (showing) and this is an indicator that cooling system has a problem and needs service

Sep 29, 2016 | 1993 Geo Prizm

1 Answer

Temp gauge will not move causing the engiane light to stay on


check your thermostat if temp Gage is not giving reading your thermostat can not be opening and closing to give reading. it must be stuck.

Aug 26, 2014 | Cars & Trucks

2 Answers

2002 aztek no heat at low rpm changed thermostat and water pump has heat at 2000 plus rpm


Defective thermostat probaly staying open, Or a blockage in the cooling system , Flush out the whole ststem, End don,t have the front of the vehicle raise up,

Nov 28, 2012 | 2001 Pontiac Aztek

1 Answer

Temperature gauge does not give accurate reading


check to see if fan stays on all the time
if not i have seen thermostats put in backwards
the thermostat is what holds water to the block to warm
to op temp then open to cool

Feb 27, 2012 | 2000 Plymouth Neon

2 Answers

00 Ford Focus runs cold


Am sure you have a thermostat stuck open, i suggest replace it and make sure the aantifreeze is in the correct level.

Dec 09, 2011 | 2000 Ford Focus

2 Answers

Temp light


well blue is OK when thermostat opens it should go off this means the car is at operating temp as long you do not have orange or red temp light should be OK hope this helps

Sep 18, 2009 | 2000 Volkswagen Beetle

1 Answer

Lights stay on


Check the pin switches on the ends of the dash. Also if the temp gauge is low replace the thermostat. If the temp gauge reads about 190, flush the heater core.

Mar 14, 2009 | 1997 Chevrolet Blazer

1 Answer

Temperature gauge


The thermostat could be stuck wide open, but that wouldn't cause the vehicle to run at such a low temperature, my bet would be on the temperature sensor. When replacing it, be sure to get the one for the dash, your enging has two temperature sensors on it, one for the guage on the dash, and one for the computer so it can monitor and adjust air/fuel ratio in accordance. You will need the temperature sensor for the dash.

Aug 05, 2008 | 2001 Pontiac Grand Am SE

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