DTC P1117: 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 Engine Coolant Temperature (ECT) sensor. Possible causes are:
- ECT sensor malfunction.
- Short or open circuit between ECT sensor and PCM.
- PCM malfunction.