P0454

P0454 - Evaporative Emission System: Pressure Sensor Intermittent






General Description
The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure Sensor (FTPS) is an integral part of the evaporative monitoring system. The ECM monitors the FTPS signal to detect vacuum decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

DTC Description
If the difference between maximum and minimum voltage of fuel tank pressure's signal is out of the threshold value, the ECM determines that a fault exists and a DTC is stored.

Detecting Condition





Wiring Schematic