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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 962 (6.4L - DTCS P000B To P0205 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P0128-Thermostat Rationality >> When Monitored

When Monitored

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

With the engine running, ambient temperature between -8°C (17.6°F) and 50°C (122°F), start up coolant temperature less than 50°C (122°F) and average vehicle speed greater than 16 kph (10 mph) until coolant temperature reaches 85°C (185°F).

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