Flashing CEL and Stalling Subaru Pleo, EVAP System Alert

Had the same issue with my 2016 Subaru Justy. The symptoms pointed to emission control problems, specifically with the activated charcoal filter system. The check engine light and rough idle were caused by insufficient air flow through the ventilation system. The activated charcoal filter was completely clogged, blocking proper fuel tank ventilation. This created excess vapor pressure, leading to the engine stalling. It was a serious issue since a blocked system can damage other components and affect fuel efficiency over time. The repair involved: Testing the purge valve operation, Replacing the activated charcoal filter, Cleaning the complete ventilation system, Resetting the engine control unit The system failure diagnosis was accurate in my case. This is not a repair to postpone or attempt without proper diagnostic equipment, as incorrect fuel tank pressure can cause additional problems. The symptoms match your description exactly, especially the stalling at idle. A qualified mechanic should perform a pressure test on the complete system to verify the exact failure point before replacing parts.

Thanks for sharing your experience. Your symptoms match exactly what I dealt with, rough idle and check engine alerts due to a ventilation system problem. The pressure sensor readings were way off and the leak detection system kept throwing errors. The repair fixed it completely for me, though I noticed slightly better fuel economy after. Would be helpful to know what you ended up paying for the full fix? Just want to get a rough idea since repair costs can vary. Have you had any other issues pop up with the ventilation system since getting it sorted?

Thanks for checking back. Since getting the EVAP system fixed last month, my Subaru runs perfectly with no ventilation issues. The repair cost was 275€ for replacing the defective activated charcoal filter. This resolved the check engine warnings and inconsistent pressure sensor readings completely. Like you mentioned, I also noticed improved fuel efficiency after the repair. This makes sense since proper fuel tank ventilation helps maintain optimal system pressure. The initial diagnosis of a ventilation system leak turned out to be spot-on. No other problems have occurred with the system since the fix. Regular maintenance checks show everything is operating normally now. The investment was worth it to prevent more serious issues that could develop from running with a faulty filter.

I decided to visit a certified mechanic after reading about similar experiences. The diagnostic test confirmed a complete EVAP system failure, exactly what was suspected. The pressure sensor showed irregular readings and the air flow was severely restricted. The repair bill came to 320€ total, covering: New activated charcoal filter, System cleaning, Diagnostic testing, Labor costs Honestly worth every cent. The engine runs smoothly now with no stalling. Fuel economy improved by about 8% after fixing the ventilation system. Three months later and no check engine warnings or other issues have appeared. Just wanted to share the outcome for others facing similar problems. Getting it properly diagnosed and fixed by a professional was the right call, even if it meant spending a bit more than attempting DIY repairs.