I installed Denzo 3534 spark plugs and now it runs fine. I still have the idle noise though, can't find anything loose. I guess I let it be, since the car runs fine and throws no error codes.

Thanks. I assumed spark plugs were pre-gaped. Anyway, the noise is at idle in either P or D. It almost sounds like when your muffler has a hole and starts to go ...
Any idea what the other wild codes were? Just a side effect of the incorrectly gapped plugs?

Hi, I have a rather odd problem on a 2017 XC90 T6 (2.0 turbo and supercharged). I have only 52k miles. Here are the original symptoms: - For several months now, the car sounds like a diesel at idle, but not at load. So once you are driving, sounds normal and there are no noticeable issues - About 6 ...