Any information on the correct drive cycle procedures? I just cleared some codes and want to get all the monitors ready again. Previously they were all set but I had a CEL for o2 sensor bank 1 sensor 1 circuit. Isnt that the one on the exhaust manifold? I also have exhaust comingnthrough my vents? What should I expect? Im going put in on a jack this weekend but how are these at 150,000 miles?