Recently I have a check engine light ON Code P26CE After checking it says Thermostat problem. After inspection under the hood I noticed that the coolant was low (the plastic rewsrvoar was empty) Afer adding necessary coolant the check engine light dessapear. Next time that code came in I noticed that the reservoar was empty again. Obviously a leack.
Conclussion: The P26CE code tells you that you are low on engine coolant therefore check for an oblious leak. See you next time, Al