P CODES (POWERTRAIN) P0400 - P0499

Check Engine Light Came On, Went To Autozone To Have It Read. They Gave Me A Printout Of What The Problems Could Be. I Was Told To Start...

I Have A Check Engine Light On Scanner Shows 401, Egr. Replaced It, Cleaned Out Tube, Changed Ecm, Had It On Diagnostics And They Said...

Engine Performance Problem 2002 Toyota Camry 4 Cylinder Two Wheel Drive Automatic 94,000 Miles. My Car Was Running Good I Went To Good...

The Code For Catalyst Efficiency Below Threshold Bank 1 Showed Up When I Purchased The Car And I Gave It Back To The Dealer And They Must...

Engine Light Came On Took To Dealer Said It Was Rear Catalytic Converter And Now Engine Is Back On And They Said It Might Be The Front One...

"catalyst System Efficiency Below Threshold (bank 1)". Is This Something I Can Repair Myself? I Have Already Changed Out All Sensors...

I Have This Code Showing Up On My Buick Can You Let Me Know What Types Of Things Can Throw This.

Caty. Conv. Efficiency Low Bank One. The Converter Has Been Replaced And The Code Later Appeared Again. The Oxygen Sensor Was Then Replaced...

Check Engine Light Is On And Need Help With The Location Of The Exhaust Pressure Sensor?

Cars Service Engine Soon Light Is On. Had Codes Read Came Up P0440-evap Small Leak/no Flow Condition, And P0459-evaporative Emission Purge...