DTC P1117: Engine Coolant Temperature (ECT) Sensor, Intermittent Malfunction: Condition
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Powertrain Control Module (PCM) detects intermittent input voltage from ECT sensor. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- ECT sensor malfunction.
- Short or open circuit between ECT sensor and PCM.
- PCM malfunction.