I have been battling this for some time. The check engine light comes after a period of time from reset. I have changed the thermostate, temp sensor, coolant flush and added per MFG.
I am down to clutch fan. ANY F'n ideas people? The temp guage sits right at 210.
From what I can tell is the check engine light comes on because the engine reaches operating temp to SLOWLY. Im guessing because the clutch fan is spinning to early in the game. Please help.