catalytic converter

Hello I got my Buick not too long ago sitting at 135k miles and it’s from Florida but I recently just moved back to Ohio and I drove , I made into Ohio and I was about 30 minutes away from home on the free way going 70mph on cruise control , I was making way up a hill And my car had down shifted...

Hello, I have a 2013 buick encore with 80,000 miles, basically brand new, but a code P0420 has been bothering me for the last few months. It drives perfectly and mpg has been the same but now it's time to get the dumb texas State inspection so I have to get rid of it. I've removed the catalytic...

I keep getting a P0420 code on my 2013 Buick Encore. I’ve replaced the CAT— replaced 02 sensors, replaced spark plugs. Cylinder 1 had a misfire, replaced that too. Now today—same code! Any advice??? I’ve put so much money into it I don’t know what else to do and neither does my Mechanic.

I have a question has anyone used a universal catalytic converter on their 2nd gen lacrosse and the codes stop coming up. Or is everyone using the direct fit.

My lacrosse has about 107,000 miles. I had no problems until a month after I had my spark plugs changed. I would get code P0420 I reset it and it wouldn't come on until about 600 miles later this happened twice. So in between the first and the last time i used cataclean to see if that would...

About 4 months ago, at around 104,000 miles, my check engine light came on. It was P0402, Catalyst System Efficiency Below Threshold Bank 1. I reset the light and it stayed off for about 400 miles, then returned. I went through several cycles of this and then tried replacing the O2 sensors...

Hello, I have a 2006 LaCrosse with only 39,000 miles on it. The dealer tells me the catalytic converter is bad. Is this covered by warranty please? Thank you very much! Marc

So the mechanic says to pass smog I need a new catalytic converter. There's an aftermarket cat that costs $600 less than the GM part. - the part dealer says the aftermarket cat can only be used for 1 of 3 engine families of the 2001 LeSabre 3.8 v6. - the engine family ID is printed on the...

The problem started last week while returning from Yakima and the speed fell from 70 to 30 before I took it off cruise. I took it to a shop this week. They said the exhaust back pressure was 3.5 psi and I needed a new catalytic converter that they would install for $1500. I ran away! The car...

I have a 2000 Buick Century 3.1 V6. I need to replace my catalytic converter but ive been searching around the web and it seems that gm knows they have weak converters and have offered an extended 10yr/120,000 mile warranty. Has anybody heard of this extended warranty and if so does it cover my...