P CODES (POWERTRAIN) P0400 - P0499

I Have A Bad Relay But I Can't Seem To Find It Anywhere On Line To Buy, I Also Am Having Trouble Getting It At A Local Auto Parts Store....

My Truck Has Been Giving Me Problems With This Code. It’s An Egr Valve. I Changed Out The Part It Says. I Cleaned Out The Throttle Body To...

A Month Ago Got A Light Saying To Check Fuel Filler Cap; Then Couple Days Ago The Cel Came On. Okay, Most Likely The Cap. If I Put A New...

Not Sure Where To Look To Id The Problem Associated With This Error Code. Please Advise.

Can You Tell Me Where To Look To Find The Problem For This Code. I Have Checked The Gas Cap And It Is Sealing Fine. Could It Be Hoses That...

Ive Had My Taurus For Almost A Year, Never Had A Problem With It. Months Ago The Check Engine Light Came On After Pumping Gas With The Car...

Have Replaced Every Part In Emissions System, Have Cleared Codes With Obd And When I Turn Off The Engine And Restart My Check Engine Light...

My Check Engine Light Came On I Had The Code Read And It Says Its The Evaporative Emission System Vent Control Circuit Intermittent? What...

I Got The Diagnostic Code That Said B0244 And 2 In The Category P0449 What Do They Mean

Engine Mechanical Problem 2004 Ford Focus 4 Cyl Front Wheel Drive Manual What Could Be The Problem With This?What May Be The Repair?