P CODES (POWERTRAIN) P0400 - P0499

I Have A 2003 Cadillac Escalade Base V8 6.0. Where Is The Location Of The Evaporative Emission High Purge Flow Valve?

Computer Problem V8 Four Wheel Drive Automatic 91000 Miles The Code Po441 Has Come On And The Guy At Autozone Has No Clue What It Is...

The Engine Runs Great But I Get A Po420 And Po430 Code. The Cost Temperatures Are Between 40 And 100 Degree Different From Upstream And...

"exhaust Gas Recirculation Flow Malfunction". What Causes It And How Can You Fix It.

When Starting Off With The Car From A Standing Stop, The Transmission (automatic) Will Shift Normally. But After A Few Shifts It Will...

P0401 Egr Insufficient Flow I Am Getting The Above Code On My Car. I Know What Needs To Be Done, And Would Prefer To Do It Myself, But...

My 01 Caravan (3.3l 6 Cyl) Had Error Codes P0442 And 0455. Smoke Test Showed Fuel Filler Neck To Be Leaking. I Had That Replaced And Now I...

Code P0420 With No Check Engine Light.(Catalytic Converter)

My '98 Suburban, 5.7l, 4sp Auto, 4wd And 176,000 Miles Is Giving The Subject Code Indicating "catalyst Efficiency Below Normal (bank 1...

My Car Is Showing Several Codes P0492 P0443 P140a P0444 And I Do Not Know What Is Wrong. My Car Does Not Seem To Struggle Nor Make Weird...