Circuit Description
WARNING: This page is about a different car, the 1998 Pontiac Bonneville, 1998 Oldsmobile Regency, 1998 Oldsmobile LSS, 1998 Oldsmobile Eighty-Eight, and 1998 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
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.
- Start-up ECT is 40-86°F (4-30C°).
- Start-up ECT is not greater than 14°F (8°C) greater than start-up IAT.
- Start-up IAT is 40-86°F (4-30°C).
- Start-up IAT is not greater than 4°F (2°C) greater than start-up ECT.
- Fuel tank level 15-85 full.
- BARO is greater than 10.7 psi (0.75 kg/cm2 )
- System voltage 8-16 volts.
- EVAP system unable to achieve or maintain vacuum during diagnostic test.