Ok so coming home the trusty td started to make a slight mechanical rattling then the check engine light came on, checked everything and it was fine about 2k down the road it did the same thing, I’m at a loss as there is no smoke or anything, I did clean the air cleaner as it was fairly filthy but no change, it seems to happen when I get the intermittent rattly sound it’s fine until that happens. I have it booked in on Tuesday to scan it and find out hopefully what it is.