Question about 2002 Chevrolet TrailBlazer

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Temp gauge stays on 100 degree trips a code po117

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You have a problem with temp. sensor. i would
purchase a new one and replace it

Posted on Apr 13, 2009

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Posted on Jan 02, 2017

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2003 grand marquis trouble code po 128. Heater works. 100 mile trips no problem. Temp gage below C. New sensor or new thermostat?


Well code 128 is for a thermostat problem in the fact the engine is not reaching normal temp. If you have heat the engine is warming up but still may not be getting to normal range. Normal is 190 - 210 degrees.
I would replace the thermostat first and see what happens.

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I have a problem with my car Peugeot 207 1.4 8 valve petrol which was serviced and had changed thermostat. Everything was fine until winter started, at temperatures below 5 degrees Celsius temperature...


This is totally normal. All radiators contain an antifreeze/ antiboil component when filled as per manufacturers instructions. This stabilizers the temp of the coolant, reducing fluctuations in temperature. The thermostat is heat responsive. Basically a piece of spring steel heated to a temperature then cooled, so as to retain the memory of when to react. Replacing the water temp sensor on this occasion was probably unnecessary, tho in saying that, I have replaced mine & friends with beneficial results.

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I just purchased a 2000 GMC Savana 3500 with the 5.7 litter engine with 92000 miles on it. The temp gauge shows that the engine is running between 100 - 160 degrees, seems too cold. The oil pressure gauge...


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Sep 16, 2013 | 2000 GMC Savana

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Complete drive cycle procedure code p1000


It depends on the make and model to some degree, but generally speaking the cycle includes a wide range of conditions.
About 100 miles of highway and city driving, all at normal operating temp. It can be done in one trip, or over several days.
You can search the internet for details for your make and model.

Aug 07, 2013 | Cars & Trucks

3 Answers

What the normal temperature operating range indicated on the temp gauge?


195 degrees is the typical high end on the thermostat (when the thermostat opens), so the temp gauge should read a max of 195 degrees, give or take a few degrees. Some people replace their thermostat with a lower temp one, such as a 180 degree one. Then the gauge will read lower (approx 180 degree max). So the range is typically from cold at start to just under 200 degrees.

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Jetta 2003 TDI


My mechanic in our town did a quick computer check. Car computer indicated a low level of antifreeze, he topped it up, cleared all messages off the car computer and said to watch the the heat guage for any further irregularities. I'll keep an eye on it, love the car, great mileage fun to drive.

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