Diagnostic Aids
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
- EVAP control system is required to detect evaporative emission fuel system leaks as small as 0.020 in. Hg, between fuel fill cap and purge solenoid.
- To help locate intermittent leaks, use the Evaporative Emissions System Tester (EEST - J 41413-200), or equivalent, to introduce smoke into EVAP system. Move all EVAP components while observing smoke with the High Intensity White Light (J 41413-SPT), or equivalent.
- A temporary blockage in EVAP purge solenoid, purge pipe or EVAP canister could cause an intermittent condition. Check and repair any restriction in EVAP system.
- To improve visibility of smoke exiting the EVAP system, observe suspected leak area from different angles with the High Intensity White Light.
- Reviewing freeze frame records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
- For intermittent conditions refer to Intermittent Conditions. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 1.8L VIBE article.