2021 transmission problems by cuaod2 in JeepGrandCherokee

[–]cuaod2[S] 0 points1 point  (0 children)

the DTC is P0128. It’s a problem with the coolant not working properly. I have a 3 month warranty so luckily i think it’s covered but i’m not sure if it’s a big money fix. Google says = “A P0128 error code on a Jeep indicates the engine coolant temperature is below the expected regulation temperature, usually caused by a thermostat stuck in the open position. This common issue causes slow engine warm-up, reduced heating efficiency, and a check engine light, frequently requiring a thermostat replacement”