When I check the system with a scanner at my local mechanic the code that appears is PO420. This car has a 3.1 v6 with automatic transmission. If anyone has encountered the same problem please e-mail any suggestions to correct the problem. Thank you and may you have a Blessed Day.
My Service Engine Soon will come on. on 1997 Buick Century
by lenova in Sidney, KY on June 27, 2014
1 answer 1 comment
ANSWER by ziptie12 on June 27, 2014
P0420-catalyst below efficiency , have system (rear O2 sensor) monitored with scanner(NOT CODE READER!!!!!) to verify converter function. Clear code and see if it returns.
COMMENT by lenova on June 28, 2014
Thank you for your response,I will have the rear 02 sensor and cat.convertor serviced. Again Thank you and have a Blessed Day.
I was having a problem with the Service Engine Soon Light coming on and when the code was read it said there was a misfire on cylinder 1. I had all my plugs ad plug wires replaced but the code per...
I just passed 74000 miles and the service engine light has come on. The car is running good, any idea why the light has come on? Thank you, Jackie