2008 escalade 6.2 with 130k miles. Completely stock. Had code for bank 2/1 sensor. Replaced with Delphi sensor. Then got code for bank 2 p1175. No running issues. No misfires. Had injectors checked. No vacuum or intake leaks. Cleaned MAF. So replaced both bank 1 & 2 sensors with ac Delco from dealer. Now I'm getting insufficient switching on both banks! P1133 & P1153. Live data shows nice sharp switching on both banks. Any ideas?