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Home >> Jeep >> 2007 >> Compass Limited, AWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0032 To P0135 >> P0128-Thermostat Rationality >> Possible Causes

Possible Causes

Possible Causes 
TEMPERATURE SENSOR WIRING OR CONNECTORS
ENGINE COOLANT LEVEL AND CONDITION
THERMOSTAT
TEMPERATURE SENSOR

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

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