friedhelmkrueger73
XC90 fuel tank ventilation leak
Summary of the thread
A 2006 Volvo XC90 owner experienced a check engine light and engine stalling at idle, suspecting a fuel tank ventilation system leak. The issue was thought to be related to a defective activated charcoal filter. Suggestions included checking the purge valve and hoses for leaks, as these components can affect the EVAP system's airflow. Ultimately, a workshop confirmed the problem was a defective activated charcoal filter, which was repaired.
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4 comment(s)
friedhelmkrueger73 (community.author)
Thanks for the tip. Where exactly is the purge valve located in relation to the charcoal canister? I'd like to inspect it before taking it in.
erwin_kaiser86
On my Audi, it was near the engine, connected to the intake manifold and the charcoal canister with vacuum lines. I recommend getting a diagram specific to the Volvo XC90 to locate it precisely. If you're not comfortable doing that, it's probably best to get it checked at a workshop. The symptoms really point to the EVAP system.
friedhelmkrueger73 (community.author)
It was indeed the fuel tank ventilation system. The workshop confirmed a defective activated charcoal filter. Repair cost was 275€ Thanks for pointing me in the right direction!
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VOLVO
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XC90
erwin_kaiser86
I had similar symptoms on my old Audi A4. Turned out to be a faulty purge valve in the EVAP system. Have you checked the purge valve and the hoses connected to the charcoal canister for any cracks or leaks? A leak there can mess with the air flow and cause system failure.