Peugeot 106 engine misfire

I had something similar on my 106. Does it feel like it's misfiring, especially when the engine is cold? For me, it was a small exhaust leak before the oxygen sensor. The sensor was reading incorrect values, messing with the fuel mixture. Might be worth a look.

Yes, the misfiring is most pronounced when the engine is cold. Can you tell me the specific location of the exhaust leak and if you noticed any other symptoms? I want to investigate this thoroughly.

From what I remember, the leak was near the manifold gasket. I didn't notice anything else besides the rough running and the check engine light. Exhaust leaks can be tricky to pinpoint without proper equipment. I took it to a workshop, and they found it quickly. It cost me around 265€ to fix, including a new gasket and labor. Might save you some headache.

I appreciate the detailed explanation and cost. I'll schedule an appointment with a workshop to inspect the exhaust system for leaks, focusing on the manifold gasket. Your experience helped guide my troubleshooting. After the repair, the faulty oxygen sensor was replaced, which resolved the error. Thanks.