jonascrystal7
AMG GT Hybrid Engine Stalling Issue
Summary of the thread
A 2021 Mercedes AMG GT Hybrid is experiencing engine stalling at idle and a check engine light, suspected to be caused by a fuel tank ventilation system leak. Possible causes include a faulty activated charcoal filter or a purge valve issue. It is suggested to conduct a smoke test at a workshop to identify the leak and confirm the problem, as sensor readings alone may not reveal the issue.
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4 comment(s)
jonascrystal7 (community.author)
Thanks for the quick reply. Are you saying the purge valve was the only cause of the check engine light and stalling for you? I didn't test the valve directly, just the pressure sensor readings, which seemed normal, but I don't know much about emission control systems.
ludwigeis95
Yep, just the purge valve on my end. Though with hybrids, things can get a bit more complicated. If the sensor readings are normal and you still have problems, better to take it to a workshop. They will smoke test the system and see where the leak is.
jonascrystal7 (community.author)
Understood. Thanks for confirming a faulty purge valve can cause those symptoms. I'll take it to a workshop for a full inspection, including a smoke test, as you suggested. The estimated repair cost, including replacing the activated charcoal filter, is about 275€. Thanks again for the help!
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MERCEDES
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AMGGT
ludwigeis95
Sounds familiar. I had a similar issue on my older BMW, though not a hybrid, check engine light and all. The problem was a faulty purge valve. Did you check the valve itself or only the sensor?