emil_sky6

Fiat Linea Exhaust Issue

I have a 2014 Fiat Linea gasoline engine with 144685 km. The check engine light is on and off, the engine runs rough, there's an exhaust leak, and the exhaust smells bad. I think it might be an exhaust treatment problem. Could it be a bad lambda sensor, or is it something else like the catalytic converter or NOx sensors?

A 2014 Fiat Linea with a gasoline engine is experiencing a check engine light, rough running, an exhaust leak, and a bad exhaust smell. These symptoms suggest a potential exhaust treatment issue, possibly involving the lambda sensor, catalytic converter, or NOx sensors. Increased fuel consumption further points to a defective oxygen sensor as a likely cause. After consulting a mechanic, the problem was confirmed to be a faulty lambda sensor, which was replaced to resolve the issue.

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4 comment(s)

I had similar issues in my Linea: check engine light, rough running. It was concerning. Did you notice any changes in fuel consumption?

Yes, fuel consumption has gone up. With these symptoms, does the lambda sensor still seem like the most likely cause? Or should I check the exhaust pipe for cracks that could be causing the leak?

The increased fuel consumption and exhaust leak make a defective oxygen sensor more likely. But it's best to have a workshop check it. They should be able to find the exact problem.

Thanks for the advice. I took it to a mechanic, and it was the lambda sensor. The repair, including the sensor and a system check, cost 375€.

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FIAT

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LINEA