In this video, we'll show you how to quickly and easily replace the thermostat housing on your Dodge Charger, Challenger, or Chrysler 300 3.6L V6 in order to fix the OBD trouble code P0128. We'll walk you through the entire process, from start to finish, so you can have your car back on the road in no time. Don't let this simple problem drag on any longer. Watch this video and you'll have your car fixed up in no time!

The code P0128 - Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, it takes too long to warm up. Often this code causes the Check Engine light to come on and off in cold temperatures.
Symptoms:
With the code P0128 there could be no symptoms at all, or any of the following:
- Engine takes too long to warm up in cold weather
- Engine temperature drops when driving on the highway, especially in cold weather
- Air conditioner and (or) temperature gauge stops working and (or) after the Check Engine light comes on (GM).
Is it safe to drive with the code P0128?
If the vehicle runs well, the coolant level is OK, there is enough heat and no other driveability problems, it's possible that the thermostat is sticking intermittently. In general, this is not a huge problem, although it might affect the gas mileage. We would still recommend having the vehicle checked out.

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