Mixture Preparation Error

I have a Bipper too, and those symptoms sound very familiar! I had a similar problem with mine a while back. Did you notice any difference in your fuel consumption? Also, have you checked the condition of your catalytic converter? A clogged cat can sometimes cause similar issues.

Thanks. I haven't observed a significant change in fuel consumption. I haven't inspected the catalytic converter. Could a faulty catalytic converter produce these symptoms, or should I focus on the fuel injection system?

It's difficult to say for sure without proper diagnostics. In my case, the problem was related to the fuel injection. Given the symptoms and mileage, it might be best to have a workshop run a proper diagnostic check. They can test the injectors and fuel pressure to pinpoint the issue.

Thanks for the advice. I scheduled a diagnostic assessment, and the issue was resolved by replacing the defective injector. The total cost was 515€.