LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System & Fuel System - 1.8L (Lay) - DTC P0441 To DTC P2A00) >> DTC P2401 or P2402 >> Circuit/System Verification >> Without Service Bay Test

Without Service Bay Test

WARNING: This page is about a different variant/trim than selected.
    IMPORTANT:
    • Ensure that the vehicle underbody temperature is similar to the ambient temperature and allow the surrounding air to stabilize before starting the diagnostic procedure. Small changes in fuel tank pressure are difficult to detect with high fuel temperatures.
    • Low fuel levels in the fuel tank can affect the accuracy of fuel tank pressure readings. Small changes in fuel tank pressure are detected sooner when the fuel level is between one half and three quarters of a tank.
  1. Engine running, observe the scan tool FTP sensor voltage parameter. Command the EVAP vacuum leak pump ON and OFF several times with the scan tool. The FTP sensor voltage should decrease slightly when the pump is activated.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
scientia non olet · About LEMON Manuals