V60 Knock Sensor Issue

Interesting. I have a V60 too, and I remember experiencing something similar a while back. That check engine light is never a good sign, is it? Higher fuel consumption and uneven idling definitely point towards a sensor issue, as those sensors constantly monitor engine performance and feed data to the engine control unit (ECU). The ECU then adjusts parameters such as ignition timing and fuel injection to optimize performance and efficiency. If the knock sensor is faulty, it can lead to incorrect ignition timing, causing poor performance and increased fuel consumption. I would check the simple things first before looking into the sensor replacement. Maybe try cleaning the connector with some electrical contact cleaner? It might just be a dirty connection.

Thanks for the tip! Electrical contact cleaner, you say? Where exactly is this connector located, and is it something I can tackle myself, or am I better off leaving it to the pros? I'm reasonably handy, but I don't want to make things worse and potentially damage the engine. Where is the knock sensor located anyways?

Okay, so, finding the exact location might be tricky without a repair manual specific to your engine. It is usually screwed into the engine block. What I would advise you to do is to visit your local workshop. They will be able to accurately diagnose the problem and offer a professional repair.

Thanks so much for your insights and support! I took your advice and went straight to the shop. Turns out, it was indeed a defective knock sensor, just like my mechanic suspected. They replaced it for 95€, and now my V60 is purring like a kitten again. Fuel efficiency is back to normal, and that annoying check engine light is finally gone! You saved me a lot of time and potential headaches.