Mini Roadster Knock Sensor Issue

Whoa, a defective knock sensor on a Mini Roadster! That sounds like a bummer. Check engine lights are never fun. Is it just idling rough, or are you noticing a performance hit too? I'm just learning about cars, but I read that the knock sensor adjusts the ignition timing to prevent engine knock, so if it's bad, maybe that's why your fuel efficiency is down?

Thank you for your response. Regarding the ignition timing, can you provide further clarification on how a malfunctioning knock sensor might affect it? I am trying to understand the underlying mechanics.

Ah, ignition timing... Basically, it's when the spark plugs fire to ignite the fuel in the engine. Too early or too late, and you get problems like knocking (hence the sensor!). If the sensor is faulty, it might be sending the wrong signals to the engine control unit (ECU), which is like the car's brain, and messing up the timing. Honestly, with those symptoms and the check engine light, I would head to a workshop to get it sorted.

I appreciate the input. The diagnostic pointed to a faulty connection at the knock sensor as suspected. The repair, including parts and labor, was 95€. I am optimistic that this resolves the issue.