The engine P0117 Code has a short meaning and it is necessary to know the right meaning and right solution for the car engine. The general meaning of the code is Engine Coolant Temperature (ECT) sensor circuit low output problem. There are several causes or reasons of the car engine problem. The first reason can be ECT sensor contribution to the ECM went to more than 0.14 Volts or 140°C (284°F) representing a short circuit in sensor or cabling. Another problem can be The ECT sensor or cabling is shorted. By the right verifying the car engine, it is possible to know the reason.