P CODES (POWERTRAIN) P0400 - P0499

The Car Won't Stat After Feeling Up. It's Showing Code P0455 The Mechanic Change The Gas Cup And The Rear And Front Valves, He Changed...

Hi, I Have A 97 Acura Cl 3.0 And My Check Engine Light Went On Few Months Ago With Error Code P0401 (egr Insufficient Flow). Did Some...

Any Ideas What's Wrong If I Am Getting A P0401 Code (egr Recirculation Flow Insufficient) But There Is No Change In Engine Performance, No...

I Bought My Car At An Auction So I Did Not Know Anything About It Or What It Had Been Through. So When I Picked It Up No Water In The...

My Check Engine Light Comes Once Every Month. The Code Is P0420. Can I Test The Rear Cat By Checking The Inlet And Outlet Temp Of The...

P0420 Was On, Cats Were Replaced With Bosal California Approved Cats As Well As New Denso Sensors. Readiness Set, No Codes For Several...

I Saw Several Messages Posted On This Issue And Wanted To Make Sure I Fully Understood What The Issue Is And The Steps To Correctly...

Obd 11 Scanner Keeps Coming Up With P0420 Code, Something Keeps Triggering The Check Engine Light To Come On And Have No Ides What. Changed...

Have A Stumble At A Steady Speed Like Twenty Five To Thirty Mph. I Already Changed Egr Valve And Pressure Feedback Sensor And Hoses.

It's That Time Of Year Again For Emissions Testing. My Vehicle Is Throwing Off Two Trouble Codes With The Check Engine Light On Solid....