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Diagnostic Aids

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Use EVAP Pressure/Purge Diagnostic Station (J-41413) to pressurize EVAP system to aid in locating intermittent leaks. Move all EVAP components while testing with Ultrasonic Leak Detector (J-41416).

A temporary blockage in EVAP canister purge valve, purge pipe or EVAP canister could cause an intermittent condition. See EVAPORATIVE EMISSION SYSTEM CLEANING in appropriate REMOVAL, OVERHAUL & INSTALLATION article.

Reviewing FAILURE RECORDS vehicle mileage since diagnostic test last failed may help determine how often condition that caused DTC to set occurs. This may assist in diagnosing condition.

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