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

Monitor Conditions

  1. When Monitored: 

    With the engine running, start up coolant temperature between -8° C (17.6° F) and 50° C (122° F), the difference between ambient temperature and coolant temperature less than 10° C (50° F) and average vehicle speed greater than 16 kph (10 mph) for more than 18% of vehicle run time.