Laguna engine power loss

I had a similar problem with my Laguna. Less engine power and the check engine light were on. Have you checked the throttle sensor and air intake? They can affect fuel efficiency and cause limp mode. Also, check the throttle body for carbon buildup.

Thanks for the reply. Can you tell me more about your experience? Was the throttle valve the reason? Did cleaning the throttle body or replacing the throttle sensor fix it, or was there something else?

Yes, a bad throttle valve was the problem for me. I suggest going to a workshop. You'll probably need to replace the throttle valve for around 265€.

Thanks a lot for sharing your experience! Your advice was really helpful. I took the car to my workshop, and the mechanic said it was a bad throttle valve. Just like you said, replacing it fixed the problem, and the cost was almost exactly what you predicted. I really appreciate your help!