Problems with Renault Latitude 2012: Engine problems and increased fuel consumption - looking for troubleshooting advice

Hey, I have a bit of experience with cars. I own a Renault Laguna, built in 2010, so quite similar to yours. It had a similar problem. It turned out that the engine control unit was faulty. I had to have it repaired at the garage and it actually cost me 1000 euros. The repair process took a few days, but after that the car was good to go again. Overall, the service at the garage was solid and they were able to identify and fix the problem quite quickly. Your symptoms sound similar to my case. So it could be the engine control unit, but without exact vehicle information and condition it's hard to say. Can you share more details about the driving behavior of your car and when exactly the problems occur? That way I might be able to help you more accurately.

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Hey, thanks for the quick reply! With my Latitude, the problem mainly occurs when I've been driving a bit longer, after about 30 minutes of driving. When the car is cold, it seems to work at first. But after about half an hour the engine starts spinning. However, the latest check was carried out at a mileage of 90362 km and no problems were found. Do you have any idea what this could be? I look forward to your feedback!

(Translated from German)

Hey, thanks for the additional information. With my Laguna, the problem persisted regardless of the driving time. The fact that it only occurs after about half an hour in your case could indicate that it's a heat-related problem. It could be that one of the engine components - possibly the engine control unit or the ignition system - is not working properly at high temperatures. The exhaust system could also be affected. However, it is interesting to note that no defects were found during the inspection. This indicates that the problem is either sporadic or that it only occurs when the engine is running and disappears again when it is switched off. In your case, I would really recommend going to a garage and having the car checked after a long drive if the problem is active. A professional diagnostic scan could then help to determine the exact problem. Sorry I can't give you a definite solution - there could be a number of reasons it really is best to take it to a professional. I hope I've been able to help you a bit though!

(Translated from German)

Hey, thanks for your detailed reply and your advice. I will definitely follow your recommendation and visit a garage. On the one hand, of course, I hope it's nothing serious. But on the other hand, of course, the problem needs to be fixed. I'll keep you posted. It was helpful to hear your experiences! Thanks again for taking the time!

(Translated from German)