P0135 ERROR CODE AND INCOMPLETE O2 AND CATALYST MONITORS
2002 Pontiac Montana
June, 24, 2012 AT 7:59 PM
No good shop works for nothing. They will and have to charge you for the actual diag as it is more than reading a code number. Be prepared to spend if you want it fixed right
June, 24, 2012 AT 8:59 PM
Went to autozone and advance, got the same error code for both. P0420, catalyst system operating below threshold, and the code appeared twice. One guy said I simply have to drive it a certain way to set the catalyst monitor, another said I need a new catalytic converter, so I dunno. No errors for the o2 sensor tho so that's better than what it was. Any ideas?
June, 24, 2012 AT 9:33 PM
If you have a code P0420 that isnt going to just go away from driving it a certain or the cat monitor isnt going to reset. You most likely need a new cat.