P CODES (POWERTRAIN) P0400 - P0499 P0420

I Love Reading Your Site And Now It Is My Turn To Ask You For Advice. I Have A 97 Toyota Camry 4 Cyl With A Code Of P0420 Catalyst...

I Failed My Emmisions Test. The Error Code Reads P0420: Catalyst System Efficiency Below Threshold (bank 1). I Have Been Told This Is O2...

I Have A 1997 Camry V6.I Had To Replace The Exhaust Manifold Pipe. On This Car The Converter Is Incorporated Into The Exhaust Manifold Pipe...

I Have A 1999 Chrysler Cirrus With This Code P0420 – Catalyst System Efficiency Below Threshold (bank 1) Sr. With This Code Analysis What...

My Vehicle Feels Like It Is Stuck At 3,000 Rpm's And 40 Mph And When I Push Harder On Acceleration Pedal It Will Slowly Climb Past 3000...

What Sensor Do I Have To Replace With P0420 Code My Car

Car First Started Missing, Not Backfiring, When I Stepped On Accelartor Harder It Would Almost Die, Make A Popping Noise, Bilge Black...

I Am Getting P0420 On My Vehicle Listed Above Base Model With 154,000 Km (95,691 Miles). Replaced Spark Plugs And O2 Censor. Used Fuel...

I Have A 2003 Chevy Impala With A 3.8 V^. Back A Couple Of Months Ago My Check Engine Light Came On And There Was A Code Of Po420 So I Went...

Hello I Have A Mercury Mystique With 144,000 Miles. I Purchased It Used In June Of 2009 So I Don't Know What Work Has Been Done On It(if Any...