p0128
Moderate
Lincoln · SUVs
Coolant Thermostat (Coolant Temp Regulation) Malfunction
Quick Answer
Error code P0128 on your Lincoln SUVs means: Coolant Thermostat (Coolant Temp Regulation) Malfunction. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Monitor coolant temperature with scan tool
2
Check coolant level and condition
3
Remove and test thermostat
4
Replace thermostat and housing gasket
5
Flush cooling system
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Thermostat assembly
Thermostat gasket and seal
Coolant fluid
Water pump gasket
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