VW Touareg Check Engine + Stalling Due to EVAP Issue

Had the same issue on my 2013 VW Tiguan Hybrid. The check engine light triggered due to a faulty purge valve in the EVAP system. The symptoms matched exactly, engine stalling at idle and rough running conditions. The pressure sensor detected inconsistent vapor flow, indicating clogged ventilation hoses. A diagnostic scan confirmed multiple emission system codes. The purge valve was stuck open, preventing proper fuel tank pressure regulation. The repair required: Complete EVAP system inspection, Cleaning of ventilation hoses, Replacement of purge valve, System pressure test, Diagnostic code reset This was a serious issue requiring immediate attention, as a malfunctioning EVAP system can lead to fuel system damage and increased emissions. The stalling could have caused unsafe driving conditions if left unrepaired. The fix restored proper tank ventilation and resolved all stalling issues. Would recommend having it checked by a shop specializing in VW emission systems, as proper diagnostic equipment is essential for accurate troubleshooting.

Thanks for describing your experience with the EVAP system repair. Since our issues sound identical, I am considering getting mine fixed at a specialized shop too. The purge valve definitely seems to be the culprit causing my engine light and stalling problems. Do you remember roughly how much you paid for the full repair? Also curious if you have had any emission system or gas cap related issues since getting it fixed? My Touareg is still under extended warranty but I want to get an idea of potential costs if they deny coverage.

The complete repair sorted out my Tiguan tank ventilation valve malfunction permanently. Zero emission system problems since having the clogged hoses cleaned and system tested, it has been running perfectly for over a year now. Total cost came to 175€ for diagnosing and fixing the blocked ventilation hoses. This included a full system inspection, cleaning, and post-repair testing to ensure proper fuel tank pressure. The engine light cleared up immediately and has not returned. The gas cap and surrounding seal were also checked during the repair, which is important since faulty seals can trigger similar symptoms. Make sure they inspect these components even if your warranty covers the main EVAP system work. Getting it fixed at a specialized shop was worth every cent compared to risking further engine damage or failed emissions tests. The proper diagnostic equipment they used made all the difference in pinpointing the exact issue.

After hesitating for a few weeks, I finally took my Touareg to a specialized VW repair shop that another forum member recommended. Best decision I could have made. The automotive repair team quickly diagnosed the problem with their advanced diagnostic equipment. Just as suspected, the purge valve had failed and the pressure sensor was showing incorrect readings. They found some clogged ventilation lines leading to the fuel tank which were causing the stalling issues. The total repair cost came to 220€, which included: New purge valve, Cleaning of the EVAP system, Full pressure testing, Labor costs The engine light turned off right after the repair and the car runs perfectly now, no more stalling at idle. The shop even showed me the old faulty parts and explained exactly what was wrong. While more expensive than my regular mechanic, their expertise in emissions systems was worth the extra cost. For anyone else facing similar issues, I strongly recommend going to a specialist rather than a general repair shop. The proper diagnostic tools and experience with these systems make a huge difference in getting it fixed right the first time.