Possible causes – Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure – Faulty Mass Air Flow (MAF) sensor Tech description There is a factory service bulletin for the following Cadillac models: 2000-2008 Cadillac Escalade2000-2008 Cadillac Escalade EXT2003-2008 Cadillac Escalade ESV2000-2008 Cadillac Factory Service Bulletin OBDII Code P0172…