3
votes
1answer
548 views

P0128: Coolant Temp Below Thermostat Regulating Temp

I have a 2005 Mazda 3 (SP 2.3), and the check engine light came on. I went out and bought a code reader that told me there are 2 codes. The first being the P0128 code and then the second is showing up ...
3
votes
3answers
2k 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 ...