Is your defective Jeep Grand Cherokee actually a LEMON?

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TSB Document:

Affected Component: ENGINE AND ENGINE COOLING

Summary
Customer complains of a MIL-on condition. Upon further inspection, there is a Diagnostic Trouble Code (DTC) P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) set in the PCM.

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Date Published
MAY 24, 2021
NHTSA TSB #
10230058
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