Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

learn more… | top users | synonyms

3
votes
3answers
3k views

What should I do about PS0128 “Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)” error code?

I have a Mazda 6 and recently purchased the OBD 2 module and saw the check engine light with the PS0128 Error Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). I ...