Circuit Description
Evaporative (EVAP) emission system includes following components: fuel tank, EVAP vent solenoid, fuel tank pressure sensor, fuel pipes and hoses, vapor lines, fuel cap, EVAP emission canister, purge lines, and EVAP purge solenoid.
Conditions required to set DTC are:
- No IAT, MAP, ODM, or TP sensor DTCs set.
- DTC P0440 test passed.
- Vacuum decay condition indicating a small leak is detected during diagnostic test.