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Symptom: P0117-ECT SENSOR VOLTAGE TOO LOW When Monitored and Set Condition: P0117-ECT SENSOR VOLTAGE TOO LOW When Monitored: With the ignition on. Set Condition: The voltage on the PCM engine coolant temperature sensor signal circuit is below 0.25 volt for more than 3 seconds. POSSIBLE CAUSES INTERMITTENT CONDITION PCM ECT SENSOR PCM ECT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND PCM ECT SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER POWERTRAIN CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → No → 2 Turn the ignition off. All Yes → Replace the PCM ECT Sensor in accordance with the Service No → 3 Turn the ignition off. All Yes → No → Repair the PCM ECT Sensor Signal circuit for a short to ground. 44 DRIVEABILITY - DIESEL |