Hi all, just after some help please, got a Disco 2 V8 2004, I have a P0300 code coming up every few minutes however the engine is running as sound as anything with no noticeable misfires. Can anyone shed some light please? Many thanks, Josh!

 

I had a similar issue, after replacing spark plugs, wires, and coils I finally replaced the knock sensors and that ended up fixing the issue. I don't know why, how, or why they didn't cause their own trouble code.

Those were pretty much the last two sensors that were original to the car. At this point, everything is all brand new OEM. I am not saying this will fix your issue, maybe it was one of the many other things I replaced. But codes did diseapear after that.