(P0128) FORCED LIMITED POWER EXCESSIVE HIGH COOLANT TEMP (CONTINUED)
When Monitored and Set Condition
² When Monitored: With the ignition on engine running.
² Set Condition: The Engine Coolant Temperature (ECT) Sensor exceeds 130°C (265°F) at the PCM. One trip
Fault
I would first make sure coolant level is proper, then suspect the ECT sensor. ( 265F is pretty darn HOT ! )
I have an UltraGuage and have never seen mine above 206F even in summer with A/C on.