P CODES (POWERTRAIN) P0400 - P0499 P0420 Questions
Used An O2 Spacer. P0420
Car Has Been Well Maintained With Records. I Got A P0420 Code. Ran A Couple Treatments With Cataclean. P0420. Used An O2 Spacer. P0420....
Asked by dc70
Code P0420?
I Am Getting A Check Engine Code Of P0420 From My Obdii Meter. I Know This Suggests A Problem With The Cat. To Eliminate Other Possibilities...
Asked by Caroline Gann
Code P0420?
Hello, I Have The P0420 Code On My Car. I Have Replaced The O2 Sensor And Have Run Cataclean Through It And The Code Has Not Cleared. When I...
Asked by quentinn
Post O2 Setting Code P0420?
P0420 Code Sets. Replaced The Cat Because Of The Milage At A Local Muffler Shop And The Code Continues. Replaced The Post O2 With One From...
Asked by FZ566QA
Code P0420?
Code P0420 Came On. This Car Has Been A Pain In The. You Know What I'm Thinking About? Dumping It But I Put So Much Money Into I Already...
Asked by prryperrys
Code P0420 Emissions System
We Have Replaced The Fuel Cap And Have Changed One Purge Value And After A Couple Of Days The Check Engine Light Came Back On. So, We Put...
Asked by countrygirl20053
Code P0420
The Previous Owner Replaced The Catalytic Converter Last Year. What Can Cause A Catalytic Converter Below Threshold? I Checked The Voltage...
Asked by Yazidan
Throwing Code P0420
My Car Listed Above Ls Model, Is Throwing Code P0420, Haven't Noticed Anything Acting Different. I'm Just Curious As To How I Could...
Asked by Heyman0718
Po420 Code
Still Getting Po420 Code I Replaced Both O2 Sensors And Catalytic Convertor
Asked by Cutor2010
Code P0420
My Ram 1500 4.7 Is Throwing A P0420 Code And I'm Trying To Figure Out Why Or If My Stft B1 S2 And Stft B2 S2 Reading 99.2% Is Normal? Mabey...
Asked by Dt0wN86