T-Roc EVAP System Stalling: Common Valve Fix Guide

I encountered a similar issue with my 2020 VW Taos, which shares many components with the T-Roc. Having some experience with EVAP system issues, I can relate to your situation. After experiencing comparable symptoms, stalling at idle and check engine light, my workshop performed leak detection tests on the EVAP system. The pressure sensor readings indicated a problem with the activated charcoal filter, which was failing to properly handle fuel vapor. The emission control system wasnt functioning as intended, affecting overall fuel efficiency. The repair involved: Complete diagnostic scan, EVAP system pressure testing, Replacement of activated charcoal filter, System reset and verification Total cost came to 275€, and the issue hasnt returned since the fix six months ago. Before suggesting specific solutions, could you share: Current mileage, When the stalling first started, Any fuel-related modifications, Whether you notice any fuel smell, If the check engine light is constant or intermittent This information would help determine if youre dealing with the same root cause, as EVAP system issues can stem from various components.

Just had my service done last week at 133128km, and your detailed breakdown really helps narrow down the issue. The stalling started about 2 weeks ago, and there is a faint fuel smell when the car sits parked overnight. The system failure warning appears intermittent, usually after short trips. The check engine light blinks occasionally rather than staying constant. Everything else is stock, no modifications to any fuel-related components. Your experience with the pressure sensor and leak detection testing matches the symptoms I am seeing. Planning to get it checked asap since fuel efficiency has also dropped noticeably this past month.

Thanks for the additional details. Given your mileage and symptoms, especially the fuel smell and blinking check engine light, this definitely aligns with my previous EVAP system diagnosis. The intermittent warning after short trips is particularly telling, as this was exactly my experience before the repair. The fuel smell and efficiency drop strongly suggest a leak in the emission control system, likely worse than what I initially encountered. The blinking check engine light indicates an active system failure rather than just a faulty sensor reading. My repair started with replacing the purge valve, but we discovered the issue extended to the pressure sensor and charcoal canister. The full fix included: New purge valve (185€), Pressure sensor replacement (160€), Complete leak detection test, System recalibration Total repair cost reached 450€, higher than initially expected, but solved both the stalling and fuel smell issues. Since youre seeing similar symptoms at comparable mileage, Id recommend getting the complete EVAP system checked rather than just replacing individual components. Important to know: The fuel smell indicates a possible safety concern, so prioritizing this repair would be wise.

Thanks for sharing such detailed repair info! Those costs actually seem reasonable for what needed fixing. The blinking check engine light and fuel smell definitely confirm Im dealing with a similar EVAP system failure. After hearing about your experience, Im going to schedule service tomorrow to get the full diagnostic testing done, especially the pressure sensor checks and leak detection. Dont want to risk further damage to the emission control system or keep dealing with poor fuel efficiency. Really helpful to know what specific parts to mention, the purge valve, charcoal canister and related components. The fact that your fix has held up for 6 months is encouraging. Hopefully my repair bill stays around that 450€ mark. Will update once I get the work completed and confirm if it resolves both the stalling and fuel tank ventilation issues.