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Symptom: EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (ACTIVE) When Monitored and Set Condition: EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (ACTIVE) - MTC When Monitored: With the ignition on. Set Condition: This DTC will set if the A/C - Heater Control Module sees abnormally high voltage on the Evaporator Temperature Sensor Signal circuit. POSSIBLE CAUSES EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED HIGH A/C - HEATER CONTROL MODULE A/C-HEATER CONTROL MODULE EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN SENSOR GROUND CIRCUIT OPEN EVAPORATOR TEMPERATURE SENSOR TEST ACTION APPLICABILITY 1 Turn the ignition off. All Yes → Repair the Evaporator Temperature Sensor Signal circuit for a short to voltage. No - For RS Vehicles No - For RG Vehicles 665 HEATING & A/C |