P CODES (POWERTRAIN) P0400 - P0499

Service Engine Light On. Code P0401 Low Egr Flow. I Tried A Different Valve From The Junk Yard (i Cleaned The Origional And The Junk Yard...

Engine Performance Problem 1998 Saturn Sl2 4 Cyl Front Wheel Drive Automatic Got The Code P0401, Which Is For Egr Insufficient Flow....

I Have A '98 Lumina With A 3.1 V6. For The Last 6 Months The Check Engine Light Has Been On. When Scanned Gives Code P0401 - Egr-...

First Of All Its A Camry Solara Wasn't In The Drop Down Window. Hey I Keep Getting A Po420. Used To Come On About Every Week. I Replaced The...

Engine Light Came On. We Get Two Codes, Both Showing P0420. Since This Code Came Up Twice, Does This Mean That The Catalytic Converter...

I Have Got This Code 3 Times In The Last 4 Months Is There Anything I Can Do? I'm A Fairly Good Mechanic. The Code Is P0420 Catalytic...

I Have A 2001 Toyota Camry With 170,600 Miles Has P0420 Code That Came On Twice. What Could Be The Problem And What Needs To Be Replaced?

How Do I Correct My 2000 Toyota Camry Ce P0420 Code?

Above Shown By Obd2 Scanner At Auto Part Store. Want To Verify That The Catalytic Converter Is Actually Clogged Up And Not Functioning.

My Suv Has Come Up With This Code. Is This The O2 Sensor? I Saw There Were 4 At An Automotive Store. Where Are They Located? Thank You...