The P0452 code on your 2023 Dodge Durango indicates a low voltage condition in the fuel tank pressure sensor circuit. This electrical code suggests the sensor signal is reading below the expected minimum threshold.
Low Sensor Voltage Analysis
The fuel tank pressure sensor outputs a voltage signal proportional to pressure. A low reading typically indicates a short to ground in the signal circuit, sensor failure with low output, or insufficient reference voltage reaching the sensor.
Durango Engine Options
The 2023 Durango offers the 3.6L Pentastar V6 and 5.7L HEMI V8. Both use the same basic EVAP monitoring system with the fuel tank pressure sensor providing critical data for leak detection and system operation.
Low Circuit Causes
The sensor may have failed, outputting consistently low voltage. A short to ground in the signal wire pulls voltage down. Connector corrosion can create ground paths. The sensor's ground reference may be corrupted. Water intrusion in the connector causes shorts.
Diagnostic Steps
Use Stellantis wiTECH to monitor sensor voltage. Normal readings should vary with pressure changes. Check for voltage at the sensor connector—verify 5V reference is present. Test signal wire for shorts to ground. Inspect connector for corrosion or moisture. If circuit tests good, the sensor has likely failed.