Diagnostic Aids
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- A diagnosed EVAP purge solenoid or EVAP vent solenoid circuit fault may have caused this DTC to set.
- PCM uses the FTP sensor to detect the amount of vacuum pulled on the EVAP system during the leak diagnostic tests. Ensure that the fuel pressure sensor is not skewed by verifying the FTP sensor on the scan tool is 1.30-1.70 volts with the ignition ON and the fuel cap removed.
- The most likely cause of DTC P1441 is a stuck open EVAP purge solenoid. Command the EVAP purge solenoid ON (PWM), with scan tool. The solenoid should click at an even rate. Replace solenoid if solenoid intermittently sticks.
- A condition may exist where a leak in the EVAP system only exists under a vacuum condition. By using the scan tool Purge/Seal function to create a vacuum, seal the system and observe the FTP sensor parameter for vacuum decay, this type of leak may be detected.