Nice Site Everybody,
I have a 1999 Suburban 1500 that the SES Light has posted (2) times in the last 3 Days. I ran the Codes with an Actron CP9/35 OBDII Scanner and had
P0420 (Catalyst System Efficiency Below Threshold (Bank 1) showing up. No other Fault Codes. No performance Issues. No Misfire. No recent Maintenance performed, just lots of Driving. Currently at 158K Original Catalytic Converters and O2 Sensors. I bought it 4 Years ago with 70K on it. From reading through the Postings, I am assuming there are (2) Cat's and (4) Sensors. I dont want to start throwing Parts at it. Maybe someone has had this before and know a good Place to Start Troubleshooting.
I have a 1999 Suburban 1500 that the SES Light has posted (2) times in the last 3 Days. I ran the Codes with an Actron CP9/35 OBDII Scanner and had
P0420 (Catalyst System Efficiency Below Threshold (Bank 1) showing up. No other Fault Codes. No performance Issues. No Misfire. No recent Maintenance performed, just lots of Driving. Currently at 158K Original Catalytic Converters and O2 Sensors. I bought it 4 Years ago with 70K on it. From reading through the Postings, I am assuming there are (2) Cat's and (4) Sensors. I dont want to start throwing Parts at it. Maybe someone has had this before and know a good Place to Start Troubleshooting.