CHEVROLET P CODES (POWERTRAIN) P0400 - P0499 P0420

Obd 11 Scanner Keeps Coming Up With P0420 Code, Something Keeps Triggering The Check Engine Light To Come On And Have No Ides What. Changed...

My '98 Suburban, 5.7l, 4sp Auto, 4wd And 176,000 Miles Is Giving The Subject Code Indicating "catalyst Efficiency Below Normal (bank 1...

Hi, I Recently Scanned My Car And The P0420 Code Came Up. It Says It Has To Do With The Catalytic Converter. Does Anyone Know Of How To Fix...

Just Had The Catalytic Converter Replaced Yesterday, And After 30 Or So Miles The Check Engine Light Came Back On, My Obd Reader Gave Me...

Hi Guys New To The Site Want To Give You A Try, It's A Goody. My Wife Has A 2001 Chevy Camaro, 3.8l, 102,000 Miles. We Keep Getting The Code...

2003 Chevy Impala 6 Cyl Automatic 90,000 Miles I Would Appreciate Any Help Or Advice. The Check Engine Light Just Came On In My Impala...

Check Engine Light Is On Engine Code Po420 Catalyst System Efficiency Below Threshold ( Bank 1) What Does This Mean?

Computer Problem 1997 Chevy Cavalier 4 Cyl Front Wheel Drive Manual Read The Codes On The Car Shows Code Po420 I Have Checked The Egr...

I Have The Running Problem Resolved. We Had To Put A Brand New Distributor In It. Now It Is Showing A P0420 Code. But I Have Had My Cataylt...

After I Replace My Spark Plugs With Champion Platinums 7940 And Spark Plug Wirers. I Had An Issue With Bad Wire On Number 5 Cylinder, And...