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Home >> Jeep >> 2021 >> Grand Cherokee Trackhawk >> Repair and Diagnosis >> Engine Performance >> System >> 6.2L - DTCS C053D To P0141 >> DTC Troubleshooting >> P0128-Thermostat Rationality >> Possible Causes

Possible Causes

Possible Causes
LOW COOLANT LEVEL
COOLING SYSTEM ISSUES
THERMOSTAT OPERATION

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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