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Super Moderator
2016 Chrysler 200 S, 1998 Sebring JX
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983 Posts
If you are repeatedly getting the P0116 and P0128 coolant sensor and t/stat fault codes and the heater is working fairly well, maybe it needs to have the PCM/TCM software updated? See TSB # 18-083-18 for 4-cyl (and 18-019-17 for the V6):


The HVAC has an update for possible improvements in heating & cooling as well:

I don't know if your car has had the updates (they are not recalls). They have been released since your car was built.
It can feel like different car when the updates are complete.
 
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