Engine Overheats in Traffic but Not on the Highway
An overheat that appears at low road speed often points toward airflow or fan-control evidence, but coolant level, circulation, pressure, and sensor accuracy still need confirmation.
Tag thermostat
P0128 Coolant Temperature Below Thermostat Regulating Range
Warm-up behavior did not match the calibrated time and load model, commonly because measured coolant temperature rises too slowly.