DTC P0117: Engine Coolant Temperature Sensor Circuit, Low Input: Condition
WARNING: This page is about a different car, the 2002 Mazda Protege5 and 2002 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set if input voltage from Engine Coolant Temperature (ECT) sensor is less than 0.2 volt. This is a continuous monitor. MIL is illuminated when PCM detects malfunction during first drive cycle. Possible causes are:
- ECT sensor malfunction.
- PCM malfunction.
- Short circuit between ECT sensor and PCM.