I HAVE A SPUTTERIG IN THE ENGINE IT SHOWED A 420...
2006 Cadillac Escalade Ext
March, 18, 2013 AT 1:19 AM
I have a sputterig in the engine, it showed a 420 code and indicated the cat, I have replaced them and all O2 sensors. I am still having issues. I have also replaced the mass air. I am at a loss on what to do, I have reset the computer as well. Could it be that I need to have the computer re flashed or replaced?