- P0453 escort
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OBD-II code P is a problem with an Evaporative Emission Control The Code P indicates that the Evaporative Pressure Sensor is . Ford Escort. The EVAP (Evaporative Emissions) System allows fuel tank vapors to be purged into the engine and burnt rather than expelled into the atmosphere as harmful emissions. The EVAP system contains a pressure sensor to check the integrity of the system. It uses this sensor, also known as.