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heinzweber22

Berlingo fuel tank ventilation issue

I've got a 2019 Citroen Berlingo with a gasoline engine that's throwing me for a loop. It's got about 88,744 km on the clock. The check engine light keeps popping on, and the engine occasionally stalls at idle, especially when it's warm. I'm starting to suspect a leak in the fuel tank ventilation system. I'm thinking maybe a defective activated charcoal filter? Anyone else run into this?

Summary of the thread

A 2019 Citroen Berlingo with a gasoline engine is experiencing a check engine light and occasional stalling at idle, particularly when warm. The suspected issue is a leak in the fuel tank ventilation system, potentially due to a defective activated charcoal filter. The conversation suggests that the charcoal canister, pressure sensor, or purge valve could be the cause, with a recommendation to have a workshop perform a smoke test to accurately diagnose and resolve the issue. Ultimately, the problem was confirmed to be a cracked charcoal canister, which was repaired.

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4 comment(s)

paul_swift4

Whoa, sounds familiar! The fuel tank ventilation system is a real headache sometimes. You're right, the charcoal canister is a common culprit. The system's designed to capture fuel vapors to prevent them from escaping into the atmosphere, and the canister stores those vapors. If it's cracked or saturated, it can cause all sorts of problems, like the ones you're describing. It could also be the pressure sensor that detects leaks, or the purge valve that controls the airflow. Have you noticed any hissing sounds around the fuel tank or filler neck?

heinzweber22 (community.author)

Thanks for the quick reply! No hissing sounds that I've noticed. I've visually inspected the charcoal canister as best I can, but it's kind of tucked away. Is there a way to test the pressure sensor or purge valve without specialized equipment?

paul_swift4

Testing those components without proper tools can be tricky. The pressure sensor uses a specific voltage range to communicate with the ECU, and the purge valve requires actuation to check its flow. Honestly, with those symptoms and your mileage, and given it's a safety critical part, it's probably best to get it checked out by a workshop that can perform a smoke test on the fuel system. That'll pinpoint any leaks for sure. Don't want any fumes building up!

heinzweber22 (community.author)

Okay, thanks for the advice. I was hoping to avoid the shop, but it sounds like that's the safest bet. I took it in, and you were spot on - it was a cracked charcoal canister. The total repair cost came out to around 275€. Thanks again for pointing me in the right direction!

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CITROEN

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BERLINGO