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Heating Issues

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Heating Issues

  #1  
Old 01-27-2019, 05:05 PM
Rob Gaborko
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My 2010 dodge charger has run into some heating issues. The engine started not coming up to temperature. Check engine light came on and I scanned the code which came up as p0128, if I remember correctly, which was thermostat failure. I have no replaced the tstat twice and still having heating issues. When idling the engine comes up to temperature and heater and defrost work awesome. As soon as I start to drove the engine loses temperature and the car starts blowing colder and colder air until the check engine light comes on. I scanned it again and now the code is P2181. Have been fighting with this issue for a bit now and hope someone can point me on the right direction.

3.5L V6 engine, coolant level fine and tstat replaced twice.
 
  #2  
Old 01-27-2019, 07:40 PM
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What brand thermostat? When I was working on my volkswagens, I would buy three or four thermostats, just to make sure I got one that worked. I was NEVER able to change it just once..... Stant is a good brand, but, stay away from the 'safety' stats. They suck.
 
  #3  
Old 01-28-2019, 08:42 AM
Rob Gaborko
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Originally Posted by HeyYou View Post
What brand thermostat? When I was working on my volkswagens, I would buy three or four thermostats, just to make sure I got one that worked. I was NEVER able to change it just once..... Stant is a good brand, but, stay away from the 'safety' stats. They suck.
I cant remember the brands but I bought the first from APC and the second from CarQuest. Because the engine and heat in the car work at idle makes me think it is not the tstat.
 
  #4  
Old 01-28-2019, 10:21 AM
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At idle, you are generally sitting still, with very little airflow thru the radiator. So, the coolant actually gets hot. Start moving, and all that changes. The radiator can shed heat a LOT faster than the engine can produce it when the vehicle is actually moving. Faster you go, the more effective the radiator is. So, coolant temp drops like a rock.

The ONLY thing regulating coolant flow, is the thermostat. If it isn't doing its job, nothing else will either.
 

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