P CODES (POWERTRAIN) P0400 - P0499 P0420

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

Hi My Name Is Henry. Ok Ive Changed The Cat Converter About 2 Years Ago Bought Brand New From Dealer. About 60,000 Miles On Cat. And The...

I Have A 2003 Matrix That Is Showing The Check Engine Light; Code Check By Dealer [po420] Specifically Points To The Catalytic Converter [$...

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...

My Car Is Running A P0420 Code. My Exhaust Manifold Clearly Has A Crack Between The Manifold Gasket And The 1st O2 Sensor. Is It Possible...

A Couple Of Days Ago My Check Engine Light Came On. Plugged A Scanner In And Got P0420, But That Was It, No Other Info. Google Says...

I Live In Texas And I Would Like To Know If It's Okay To Replace My Catalyst Converter With An Universal One- I'm Not Sure If It'...

I Own A 2001 Toyota Sienna Xle Van. The Other Day I Backed My Van Up And I Must Have Backed Into A Snowbank, And I Believe I Got Snow In My...

My Car Started To Shake For About Two Seconds And Then A P0420 Code Came Up. Would A Bad Catalytic Converter Cause This? Thanks

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...