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Home >> Chrysler >> 2021 >> Voyager LX, Gas >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P0058 To P018D >> Diagnosis And Testing >> 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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