P CODES (POWERTRAIN) P0400 - P0499 P0420

I Have A 2008 Nissan Altima I Kept Getting The Code P0420 Which Resulted In Me Getting Another Transmission (used) Got That Put In I Can...

Trouble Code P0420-catalyst System: Efficiency Below Threshold (bank 1).

What Oxygen Sensor Is Having The Problem

Catalyst Below Threshold Bank 1 Is The Only Fix For This To Replace The Converter And If So How Do You Reset The Code After Replacement Of...

Code P0420 With No Check Engine Light.(Catalytic Converter)

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

Car Had 2 Codes, An Egr Low Flow P0401 And P0420 Cat Inefficient Code. Pulled Egr And Tb, Cleaned Out Egr Passages, Which Were Completely...

Hey. I Have Obdii Scan Code Of P0420 And I Looked It Up And Has To Deal With A Low Bank 1 Cat Conveter. What Does This Mean? Do You...

My Minivan Shakes When On The Freeway Going Over Fifty Mph. If I Take Foot Off The Accelerator The Shaking/vibration Stops And Engine Runs...

Hi. Well My Question Is The Code P0420, What Would Cause This Code To Show Up. I Have Went Through And Checked For Vaccum Leaks And...