A friend of mine was having all kinds of codes and problems running his car at the track. Its a 2015 S550 thats almost stock. So I logged his car for him and we found it running really rich but with the knock sensores turned OFF! As one can imagine the car runs ruff and dies often at ideal. The codes are P0012 and 11 plus several 300 codes... But no Knock error codes... I assume some tuner turned off the knock sensor??? The car has only been to Ford and a reputable tuner here in Chile. is it strange that I get no Knock readings as well as no knock errors??