Seat Ibiza diesel engine rough running

Rough running and check engine light, eh? Sounds familiar. I had similar issues with my old Renault Megane, although it was a petrol engine. The car felt like it was constantly misfiring. Have you tried checking the car sensors or looking into a system reset? It might be worth exploring before you start replacing parts. Could save you some serious money!

Interesting. When you say 'system reset,' are you referring to the 'reset procedure' for the quantity drift compensation specifically, or just a generic ECU reset? I'm trying to understand the level of detail required to address this issue with the car sensors. And did the car sensors need recalibration afterward?

Ah, sorry, I wasn't being precise enough. I meant the generic ECU reset. In my case, it only provided a temporary fix. The problem came back a few weeks later, and eventually, I had to bite the bullet and replace the faulty injector. It's like trying to fix a leaky tap with a rubber band – it might hold for a bit, but it's not a permanent solution. If the error code points to the injector, I'd strongly recommend getting it properly diagnosed by a workshop before attempting any elaborate reset procedures. They have the right equipment for compensation adjustment and can save you time and potential headaches.

Understood and many thanks for the insights. I took it to a trusted workshop, as suggested. The diagnosis confirmed a faulty injector. After replacement and performing the reset procedure using diagnostic equipment, the engine runs smoothly again. Total cost came to 515€. Fuel economy seems to be back to normal as well.