This is for those of you that keep getting the re-occuring codes P0011 and P0021. Basically, this pertains to vehicles w/ AVCS. Yeah, there are bulletins on filters and other silly stuff that may apply to some peoples cars but there are other "underlying" issues at hand. Oiling problems to name one. Let me show you some examples that have passed through my shop within the last month (at least 4 different cars).