The P0537 code on your 2023 Dodge Durango indicates a low voltage condition in the A/C evaporator temperature sensor circuit. This suggests the sensor signal is being pulled to ground.
Low Circuit Analysis
Low voltage from the evaporator temperature sensor typically indicates a short to ground. The climate control module expects a specific voltage range; readings below minimum suggest unwanted current flow to ground somewhere in the circuit.
Durango Climate System
The 2023 Durango features tri-zone automatic climate control for this three-row SUV. Accurate evaporator sensing is essential for providing comfortable cabin temperatures throughout the vehicle.
Causes of Low Readings
The thermistor sensor may have internal shorts. Wiring in the HVAC housing may be damaged. Moisture in the HVAC system can cause shorts. A damaged connector creates ground paths. Physical damage to the sensor from service or debris.
Diagnostic Steps
Use Stellantis wiTECH to monitor evaporator sensor voltage. Check if it's stuck low or responds to temperature changes. Disconnect the sensor—if voltage returns to normal, the sensor is shorted. Test wiring for shorts to ground. The sensor location inside the dash makes access challenging.