No other codes, this is the first ever for the car. Very rarely does it do short trips. My wife drives the heck out of this car which is why it has so many miles on it already. I will look into inspecting the exhaust soon. Here is the scan tool: http://www.ebay.com/itm/171942489065 not sure if it ha...

Thanks for sharing. Your cylinder#6 plug looks way better than mine imo.The car has been getting standard oil. I wouldn't think it would cause only one plug to fowl more than the others, but I didn't know about the crankcase vent. I suppose I could look into that, but would it cause the P0420 code? ...

Hello all, first post! My wife and I both have Volvos and my wife's 2013 XC90 has a problem and I am not sure what is causing it. The car has 97k miles and we have owned it since new. A couple of weeks ago, the car gave a check engine light which was P 0420 Bank 1 code. I know its a general code and...