2005 Cadillac STS 3.6L - CHECK ENGINE LIGHT ON - P0452 - FUEL TANK PRESSURE LOW VOLTAGE
Check engine light on, service code p0452 - low voltage at fuel tank pressure sensor. Pressure sensor on this vehicle is on the charcoal canister above the rear crossmember. Disconnect the pressure sensor and check for ohms reading. Sensor have a open circuit. Replace sensor and cleared light.