Nissan Winner Stalling Rough Idle

I have a Nissan Winner too, though I'm not sure about the year. I had almost the exact same symptoms a while back – engine stalling, check engine light, the works! It drove me crazy. Have you checked the fuel injectors? A faulty injector can cause similar problems, like rough running and poor fuel economy. I would also recommend you to measure the fuel pressure. I ended up having a problem with the fuel pump relay. Is the engine struggling even if the fuel tank is full?

Thanks for the quick reply! I haven't specifically checked the fuel injectors yet, but that's a good suggestion. The engine seems to struggle regardless of how full the fuel tank is. Where exactly is the fuel pump relay located, and how can I test it? What's the easiest way to measure the fuel pressure?

Okay, so the fuel level isn't the issue. That's one thing ruled out. Honestly, I'm not entirely sure about the exact location of the fuel pump relay on the Winner. I just took mine to a workshop. I think it's better to avoid any issues if you're not that experienced. It is probably a defective cable or plug connection as you suggested. My experience was very similar to your described issue and it was a defective component. Given all the symptoms you're describing, especially with the error code stored, I'd strongly recommend getting it checked out by a professional. You don't want to risk causing further damage.

Thanks for the advice! I think you're right; I'll take it to a workshop to get it properly diagnosed. The mechanic confirmed it was indeed a defective fuel pump cable connection, and the repair cost me around 95€. Runs like new now!