Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: EVAP Pressure/Purge Diagnostic Station (J- 41413) is required to pressurize EVAP system in the following test.

Fig 1: DTC P0440: EVAP System (Steps 1-4)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0440: EVAP System (Steps 5-14)

Courtesy of GENERAL MOTORS CORP.

Fig 3: DTC P0440: EVAP System (Steps 15-18)

Courtesy of GENERAL MOTORS CORP.