P0455-EVAP System Large Leak: Notes

Fig 1: Fuel Tank Pressure Sensor Circuit Schematic

Courtesy of CHRYSLER LLC

1. When Monitored  : Engine Running. Cold start test. Fuel Level greater than 12%, ambient temperature between 4°C and 32°C (39°F and 89°F), closed loop system operation. Test runs when small leak test is maturing.
2. Set Condition  : The PCM activates the EVAP Purge Solenoid to pull the EVAP system into a vacuum. The PCM turns the EVAP Purge solenoid off to seal the EVAP system. If the fuel tank pressure sensor reads normal operating pressure sooner than expected, a Large Leak error is detected.

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .