VW Eos Stalling Fix: EVAP System Ventilation Guide

This sounds very similar to what I experienced with my 2014 VW Golf. Having some experience with fuel system issues, I can relate to your ventilation concerns. My car showed identical symptoms, stalling at idle and an intermittent check engine light. The emission system was triggering warnings, but the pressure sensor readings were also normal in my case. After multiple stalls, I took it to a workshop where they diagnosed clogged ventilation hoses in the fuel tank system. The hoses had accumulated debris over time, restricting proper tank ventilation. The repair involved cleaning and replacing several components of the vapor management system, costing 175€. The fix completely resolved both the stalling and check engine light issues. However, before suggesting this is definitely your problem, it would help to know: Have you noticed any fuel smell? Does the problem occur more frequently after refueling? What error codes is your check engine light showing? Has your fuel consumption changed recently? This information would help determine if your Eos is experiencing the same fuel tank ventilation issue my Golf had.

The cleaning and replacement fixed my stalling issues completely. After checking my records from my last service at 18496km, I found they had noted a similar ventilation problem developing. I received P0441 and P0455 codes initially, indicating an emission system malfunction. The first code points to incorrect purge flow, while the second suggests a larger leak in the evaporative system. Basic automotive repair steps like checking the gas cap for proper sealing didnt resolve it. When the mechanics tested my tank ventilation system, they found restricted flow in multiple hoses. The check engine light hasnt returned since the repair. For a proper diagnosis, I recommend having the complete EVAP system tested rather than just replacing parts. This saved me from unnecessary component replacements.

Thanks for sharing those details about your repair experience. It matches exactly what I found on my Golf, those P0441 and P0455 codes are classic signs of EVAP system issues. The gas cap check is always a good first step, but like in your case, my purge valve and associated hoses were the real culprits. The debris buildup in the fuel tank ventilation system seems to be a common weakness on these VW models around the 18000-20000km mark. I had my complete emission system tested during the repair too. The mechanic found that the purge valve was sticking intermittently due to the clogged lines, causing irregular fuel tank pressure. Once they cleaned the system and replaced the compromised components, the stalling disappeared completely. For anyone else reading with similar symptoms: getting the full system diagnosed saved me from the trial-and-error parts replacement approach. The pressure sensor readings alone dont always tell the full story when dealing with EVAP system problems.

I appreciate the detailed feedback about similar EVAP system problems. After having my car serviced last week, they found and fixed the exact issues mentioned, clogged ventilation lines and a sticking purge valve. The P0441 and P0455 codes from my emission system turned out to be critical clues. My automotive repair technician confirmed the tank ventilation system was severely restricted. They performed a complete pressure sensor test and discovered multiple blockages affecting the EVAP system performance. The repair cost was 220€ and included cleaning the entire ventilation system plus replacing two damaged hoses. The stalling problem disappeared immediately after the fix, and my check engine light hasnt returned. This experience taught me that proper diagnosis of the complete system is essential. While my initial focus was just on the ventilation valve, the actual solution required addressing multiple components in the emission system. For others facing similar issues, I strongly recommend getting the entire EVAP system tested rather than replacing individual parts based on assumptions.