When Monitored and Set Condition

DTC P0422: EVAP SYSTEM SMALL LEAK

• 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) Close Loop fuel system. Test runs when small leak test is maturing.
• 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 between -1.5 to +1.0 hPa before the calibrated amount of time for a Medium leak/Small leak an error is detected. Two Trip Fault.

DTC P0455: EVAP SYSTEM LARGE LEAK

• 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.
• 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.