DTC P0128 - Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)

WARNING: This page is about a different variant/trim than selected.

DTC DESCRIPTION P0128 - COOLANT THERMOSTAT (COOLANT TEMP BELOW THERMOSTAT REGULATING TEMPERATURE)

Description:	This DTC sets when the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time.
Possible Causes:	Insufficient warm up time Low engine coolant level Leaking or stuck open thermostat Damaged engine coolant temperature (ECT) sensor Damaged cylinder head temperature (CHT) sensor
Diagnostic Aids:	Refer to THERMOSTAT MONITOR for system information.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Continental 2.0L,	GO to PINPOINT TEST DX .
Continental 2.7L,
Continental 3.0L,
Corsair,
EcoSport 1.0L,
EcoSport 1.5L,
EcoSport 2.0L,
Edge,
Escape/Kuga,
Explorer,
Fusion 1.5L,
Fusion 2.0L,
Fusion 2.7L,
KA,
MKZ,
Mustang 2.3L,
Nautilus,
Ranger,
Transit Connect
All others	GO to PINPOINT TEST DL .