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mika_huber17

C3 exhaust leak

I'm having trouble with my 2023 Citroen C3 gasoline. The check engine light keeps popping up, and the car feels like it's lost a lot of power. I've also noticed my fuel consumption has gone up. The car only has about 20k km on it. Could it be a faulty exhaust temperature sensor? Has anyone else experienced this?

Summary of the thread

The conversation revolves around a 2023 Citroen C3 experiencing a check engine light, reduced power, and increased fuel consumption. These symptoms suggest a potential issue with the exhaust system, possibly a faulty exhaust temperature sensor due to a leak. It is advised to have a professional inspection to accurately diagnose and repair the problem. The issue was confirmed to be an exhaust leak affecting the sensor, which was resolved by a garage, restoring the car's performance.

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4 comment(s)

dirk_weber10

The symptoms you describe—the check engine light, reduced engine power, and increased fuel consumption—strongly suggest a potential issue with the exhaust system. In particular, a faulty exhaust temperature sensor, as you hypothesized, could indeed be the culprit, especially if there's a leak in the exhaust system affecting the sensor's readings. I once faced a similar problem with my Citroen C3. To properly diagnose the issue, have you checked the exhaust system for any visible damage or leaks?

mika_huber17 (community.author)

Thanks for the reply! I haven't checked for any leaks myself, honestly. I'm not really sure where to start looking. Any tips on where I should be looking or what to look for?

dirk_weber10

Given your intermediate level of expertise, I would strongly recommend against attempting a self-diagnosis and repair of the exhaust system. The exhaust system is a critical component for emission control, and any improper handling could exacerbate the problem or even create new ones. A leak in the exhaust system can be difficult to detect without the proper equipment and knowledge. Therefore, I suggest taking your C3 to a qualified workshop for a thorough inspection. They will be able to accurately pinpoint the source of the problem and perform the necessary repairs.

mika_huber17 (community.author)

Thanks so much for the advice! I took it to a local garage and they confirmed it was a leak in the exhaust system, which caused the exhaust temperature sensor to malfunction. They replaced the faulty sensor and repaired the leak, and the total cost was around 265€. Everything seems to be running smoothly now!

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CITROEN

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C3