hermannkoch74
Mercedes V Klasse Diesel Engine Stalling
Summary of the thread
A 2018 Mercedes V Klasse diesel was experiencing engine stalling at idle and a check engine light. The initial suspicion was a problem with the tank ventilation valve, possibly within the EVAP system. A mechanic suggested clogged hoses affecting the pressure sensor as a potential cause. After inspection, it was confirmed that partially clogged hoses were indeed the issue, and cleaning them resolved the problem, turning off the check engine light.
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4 comment(s)
hermannkoch74 (community.author)
Thanks I looked at the hoses but didn't see anything obvious You mentioned a leak affecting the pressure sensor readings Can you say more about what those readings should be normally, and how a visual check might miss something subtle
jakobjohnson8
Getting into exact pressure sensor readings is technical without the right tools If you didn't see anything obvious like a split hose, it might be a partial blockage or a faulty valve I'd recommend a workshop check They can properly diagnose the EVAP system
hermannkoch74 (community.author)
Thanks for the advice I took it to a mechanic, and you were right Some hoses were partially clogged, messing with the pressure The tank ventilation valve was working The repair cost 175€ to clean everything The check engine light is off now
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MERCEDES
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VKLASSE
jakobjohnson8
Sounds like an EVAP system issue I had similar check engine symptoms with my V Klasse Have you checked for any obvious cracks or disconnections in the hoses connected to the tank ventilation valve A leak there could mess with the pressure sensor readings and cause the stalling