probak118 Posted December 9, 2019 Report Share Posted December 9, 2019 Coolant thermostat temperature below thermostat regulating temperature code read after engine light came on while driving. I have such a sort ride to work daily 9 miles both ways I doubt my engine gets to normal operating temperatures really. I reset the code and hope my thermostat just was a little sticky and was opened ? My coolant temp was reading about 90 C ( 194 F) but I then idled at home till it got to about 205 F and my electric fan kicked on and temp dropped. Complete fluid change out in 2018 and am going to compare temp of in car readout and a digital readout pointed at radiator inlet hose to verify both are the same temperatures. If so may change thermostat just to be safe, looks to be wide open and easily changeable myself, at least if sticking it is not sticking closed and overheating. Any tips I should know from those who have changed thermostat themselves ? Quote Link to comment Share on other sites More sharing options...
yyz Posted December 9, 2019 Report Share Posted December 9, 2019 I haven't done it but I suggest you state what engine you are working with if you want a valid answer. Quote Link to comment Share on other sites More sharing options...
2late4u Posted December 9, 2019 Report Share Posted December 9, 2019 11 hours ago, probak118 said: Coolant thermostat temperature below thermostat regulating temperature code read after engine light came on while driving. I have such a sort ride to work daily 9 miles both ways I doubt my engine gets to normal operating temperatures really. I reset the code and hope my thermostat just was a little sticky and was opened ? My coolant temp was reading about 90 C ( 194 F) but I then idled at home till it got to about 205 F and my electric fan kicked on and temp dropped. Complete fluid change out in 2018 and am going to compare temp of in car readout and a digital readout pointed at radiator inlet hose to verify both are the same temperatures. If so may change thermostat just to be safe, looks to be wide open and easily changeable myself, at least if sticking it is not sticking closed and overheating. Any tips I should know from those who have changed thermostat themselves ? sounds like the fan and your thermostat is working correctly to me, not sure why you got a code but 194 and running and 295 when sitting at idle sounds okay/ Quote Link to comment Share on other sites More sharing options...
Summer Solstice Posted December 10, 2019 Report Share Posted December 10, 2019 I agree. Sounds like it's working fine to me also. Like you say, you do have a very short trip and the engine likely does not warm completely up. My 3.6L has a very difficult time reaching 195 in the cold of winter. It is functioning normal just tends to run on the cold side in the deep of winter. If the problem comes back and you are confident that the engine temperature is correct you may have a bad temperature sensor or lose connection. Quote Link to comment Share on other sites More sharing options...
Hankster Posted December 10, 2019 Report Share Posted December 10, 2019 Time for a new thermostat. Easy diy job on either 2.4l or 3.6l. Hank 2late4u and jkeaton 2 Quote Link to comment Share on other sites More sharing options...
probak118 Posted December 20, 2019 Author Report Share Posted December 20, 2019 (edited) Hankster On 12/9/2019 at 9:22 PM, Hankster said: Time for a new thermostat. Easy diy job on either 2.4l or 3.6l. Hank Job was almost too easy...30 minutes at the most including a 10 minute beer break. Funny part was NAPA sold the entire assembly already assembled cheaper than buying just the thermostat and gasket alone ! Now my coolant temp climbs to and holds around 90 C ( 191 F ) easily on those -8 C (17 F ) morning 7 minute drives lately. Wife was not impressed with the heat level when coolant temp maxed at 71 C ( 162 F ) while driving LOL , thanks all for your replies Edited December 20, 2019 by probak118 2late4u 1 Quote Link to comment Share on other sites More sharing options...
agm2112 Posted January 27, 2020 Report Share Posted January 27, 2020 I was receiving P0189 error even in the extreme heat of Brazil. Just replaced the thermostat and now the engine is at 91 C on the road. Before was 83~86. Quote Link to comment Share on other sites More sharing options...
2late4u Posted January 28, 2020 Report Share Posted January 28, 2020 (edited) 5 hours ago, agm2112 said: I was receiving P0189 error even in the extreme heat of Brazil. Just replaced the thermostat and now the engine is at 91 C on the road. Before was 83~86. (91°C × 9/5) + 32 = 195.8°F that is normal for a 3.6 engine at least that is about where mine ranges from 185-215 depending on temperature and driving conditions make sure you dont have a air bubble in the coolant system this was just discussed a few days ago check the forums for the post and or google on how to use the bleed screw to help remove the bubble from the system Edited January 28, 2020 by 2late4u jkeaton 1 Quote Link to comment Share on other sites More sharing options...
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