P CODES (POWERTRAIN) P0400 - P0499

I Have A Problem With The Same Code (p0420) Coming Back. I Own A Actron Auto Scanner Model Cp9180. I Look The Code Up And I Get Catalyst...

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 The Images For The Location Of The Fuel Tank Pressure Sensor, But Is Isn't There. I Cant Find It In The Engine Compartment Or At The...

I Have A 2004 Ford Explorer 6 Cylinder. I Need To Get The Car Registered, However The Check Engine Light Is On. I Checked, And The Code...

Engine Light Came On And Car Started Running Very Rough. Was Low On Oil. Had Oil Changed And Fuel System Flushed. Car Ran For 1 Day And...

Hi, I Just Purchased This Vehicle. It Had A Check Engine Code Po410 And Replaced All The Parts, Secondary Air Supply, Secondary Valve...

1997 Malibu, Code Po442 I Know That Is Small Leak In Evap. Do You Have A Diagram For It? Components And Wiring.

Car Has Check Engine Light On. I Changed The Cat On The Bottom Of The Car But Still Has Light On. I Understand That It Can Be A O2 Sensor...

My Wife Took Our 96 Blazer A Few Days Ago Filled It Up With Gas. A Few Miles Down The Road It Died. After Towing It Home And Squirting A...