P CODES (POWERTRAIN) P0400 - P0499 P0420

I Have P0420, And The Original Ecm. If I Were To Go To A Junkyard Or Pick N Pull, How Would I Know If The Used Ecm Was One Of The Ones...

P0420 Cayalyst Bank1 Is The Culprit, After 3 Attempts To Clear This Issue It Still Remains, 1. Replaced Vsv, 2. Replaced Egr, 3 Replaced...

Engine Performance Problem 2000 Chevy S-10 6 Cyl Four Wheel Drive Automatic What Do I Need To Repair To Correct This Trouble Code? ...

What Is Trouble Code P0420 And How To Perform The Repairs.

On Code Po420 Cat. Converter, Does That Mean You Need To Replace Your Converter? Or Could Something Eles Be Wrong, I Hate To Spend Money On...

I'm Getting A P0420 Code And Trying To See If Replacing The Sensor Helps.

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...

I Initially Had The P0430 Popping, Which, Upon Checking Said My Bank 2 Catalyst Is Performing Below The Threshold. The First Step I...

Good Evening And Thank You In Advance. Recently My Check Engine Light Came On. I Checked It With A Reader And It Showed A P0420 Code. I...

I Got The Error Code P0420, Catalyst System Efficiency Below Threshold Bank1. I Know That I Have A Possible Exhaust System Leak, But...