VW Golf Stalling: EVAP System Leak Symptoms & Fixes

As someone with moderate experience working on VWs, I had a very similar issue with my 2012 Jetta with the 2.0L gasoline engine. The symptoms you describe match exactly what I encountered, check engine light, rough idle, and fuel system problems. After some diagnostic work, my workshop found a defective activated charcoal filter in the EVAP system. This component is crucial for managing fuel vapors and maintaining proper system pressure. The repair involved replacing the charcoal filter and testing the complete EVAP system to ensure no other components like the purge valve were affected. The total repair cost was 275€, including parts and labor. Since the fix, fuel efficiency improved noticeably and the check engine light hasnt returned. To help diagnose your specific case more accurately, could you share: Engine size and type, Current mileage, Any other warning lights or symptoms, Whether you notice a fuel smell, If the problems get worse after refueling These details would help determine if your Golf is experiencing the same EVAP system failure I encountered with my Jetta.

As someone with moderate experience working on VWs, I had a very similar issue with my 2012 Jetta with the 2.0L gasoline engine. The symptoms you describe match exactly what I encountered, check engine light, rough idle, and fuel system problems. After some diagnostic work, my workshop found a defective activated charcoal filter in the EVAP system. This component is crucial for managing fuel vapors and maintaining proper system pressure. The repair involved replacing the charcoal filter and testing the complete EVAP system to ensure no other components like the purge valve were affected. The total repair cost was 275€, including parts and labor. Since the fix, fuel efficiency improved noticeably and the check engine light hasnt returned. To help diagnose your specific case more accurately, could you share: Engine size and type, Current mileage, Any other warning lights or symptoms, Whether you notice a fuel smell, If the problems get worse after refueling These details would help determine if your Golf is experiencing the same EVAP system failure I encountered with my Jetta.

Had my regular service just last month at 74023km and they found no issues. The emission control light started flashing just after that. Beyond the symptoms already mentioned, I noticed a strong fuel smell recently, especially after filling up. The air flow also seems irregular, as the engine runs rough even when warm. I ran a basic scan and got error code P0456, pointing to a possible EVAP system leak. Before taking it back to the shop, wanted to check if anyone here replaced similar parts with success.

Had my regular service just last month at 74023km and they found no issues. The emission control light started flashing just after that. Beyond the symptoms already mentioned, I noticed a strong fuel smell recently, especially after filling up. The air flow also seems irregular, as the engine runs rough even when warm. I ran a basic scan and got error code P0456, pointing to a possible EVAP system leak. Before taking it back to the shop, wanted to check if anyone here replaced similar parts with success.

Thanks for those additional details. On my Jetta, I also got the P0456 code which confirmed the EVAP system leak. The fuel smell you mentioned is a key indicator, I experienced the same issue, particularly strong right after refueling. The purge valve ended up being fine on mine, but the pressure sensor was giving false readings alongside the faulty charcoal filter I mentioned earlier. The system failure was causing incorrect pressure management in the fuel tank, leading to those rough running symptoms. Since you mentioned the recent service, its worth noting that sometimes disturbing the EVAP components during routine maintenance can reveal existing weak points in the system. My emission control warning also started shortly after a service. The repair cost might vary slightly from what I paid (275€), depending on which components need replacement. In my case, replacing both the charcoal filter and pressure sensor resolved all symptoms: Engine running smooth again, No more fuel smell, Check engine light cleared, Proper idle restored With similar symptoms and the same error code, Id suggest having your EVAP system thoroughly tested, focusing on those components that fixed my issues.

Thanks for those additional details. On my Jetta, I also got the P0456 code which confirmed the EVAP system leak. The fuel smell you mentioned is a key indicator, I experienced the same issue, particularly strong right after refueling. The purge valve ended up being fine on mine, but the pressure sensor was giving false readings alongside the faulty charcoal filter I mentioned earlier. The system failure was causing incorrect pressure management in the fuel tank, leading to those rough running symptoms. Since you mentioned the recent service, its worth noting that sometimes disturbing the EVAP components during routine maintenance can reveal existing weak points in the system. My emission control warning also started shortly after a service. The repair cost might vary slightly from what I paid (275€), depending on which components need replacement. In my case, replacing both the charcoal filter and pressure sensor resolved all symptoms: Engine running smooth again, No more fuel smell, Check engine light cleared, Proper idle restored With similar symptoms and the same error code, Id suggest having your EVAP system thoroughly tested, focusing on those components that fixed my issues.

Thank you for sharing that detailed information about your Jetta repair. Based on the identical error code and similar symptoms, I will have my mechanic check both the charcoal filter and pressure sensor. The strong fuel smell after filling up matches exactly what you experienced, so this gives me confidence about the likely culprits. The total repair cost of 275€ helps set my expectations before heading to the shop. My main concern was the emission control system acting up so soon after the regular service, but your explanation about maintenance potentially revealing weak points makes sense. I will get it checked this week since the fuel smell and rough idle are getting worse. Hopefully replacing those EVAP components will resolve the check engine warning and restore proper fuel tank pressure like it did in your case. Thanks again for sharing your repair experience, this helps narrow down where to focus the diagnostic work rather than replacing parts out of nowhere.

Thank you for sharing that detailed information about your Jetta repair. Based on the identical error code and similar symptoms, I will have my mechanic check both the charcoal filter and pressure sensor. The strong fuel smell after filling up matches exactly what you experienced, so this gives me confidence about the likely culprits. The total repair cost of 275€ helps set my expectations before heading to the shop. My main concern was the emission control system acting up so soon after the regular service, but your explanation about maintenance potentially revealing weak points makes sense. I will get it checked this week since the fuel smell and rough idle are getting worse. Hopefully replacing those EVAP components will resolve the check engine warning and restore proper fuel tank pressure like it did in your case. Thanks again for sharing your repair experience, this helps narrow down where to focus the diagnostic work rather than replacing parts out of nowhere.