Circuit/System Testing
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.
Disconnect the EVAP purge pipe from the EVAP canister purge solenoid valve.
- If the Fuel Tank Pressure Sensor parameter is less than 1.7 volts, replace the EVAP canister purge solenoid valve.
- If the pressure is greater than 1.7 volts, replace the FTP sensor.