I have an OBD II code of P0327, Knock sensor 1 circuit low input bank 1 sensor 1. Where exactly is the knock sensor on this particular engine? It is a V6 engine. I also got a code of P0401, EGR flow insufficient. I thought I'd start with the knock sensor and see if the other resolves itself. I cannot seem to locate the knock sensor to ensure I am ordering the correct part. Any help would be greatly appreciated, pictures even more so. Thanks.