P CODES (POWERTRAIN) P0400 - P0499 P0449 Questions

4 Cyl Automatic Front Wheel Drive Problem... I Have A 2007 Saturn Vue Hybrid, The Check Engine Light Gave Code P0449 Which Is A Code...

Last Year I Replaced The Evaporative Emission Control Solenoid, And The Code Was Gone And Now It's Come Back. Can You Plese Send Me A...

5 Volt Reference #2 Circuit Short To Ground. 5 Volt Reference Circuit Ftp Shorted To Voltage. Symptoms, Not Getting Fire To Plugs...

My Check Engine Light Came On A Few Weeks Ago And It Would Not Come On Some Times Until I Drove For Awhile. Now It Stays On All The Time....

Originally I Had A Code P0455, Installed A New Gm Gas Cap (replacing Original). Now I Have A P0449. So My Question Where Is The Vent Valve...

I Have The Truck Listed Above. It Started Sputtering, Hesitating, Not Shifting Right Like It Had Bad Gas. We Went To O Reilly's, And...

Code P0449 Came On. I Was Told To Replace The Solenoid Vent Canister. I Did, Reset The Code And It Popped Right Back Up. Tried Resetting It...

I Changed The Vent Solenoid,and Erased The Code And It Reappeared Within Minutes. What Could Be The Problem? Thanks

Trying To Pass Emissions Test Failed Once Code P0449 Changed Charcoal Canister, Vapor Canister Vent Solenoid, Gas Cap, Cleaned Corrosion Out...

I Need Help Identifying What Parts I Need. All Information Online Is For Yukon Xl 1500 Or Other That Do Not Match My 2004 Yukon Xl 2500....