P CODES (POWERTRAIN) P0400 - P0499

Got The Code And Cant Get Rid Of It, Replaced Canister Vent Solenoid And Still Light Comes On, Do I Need To Replace The Canister Purge...

I Have A 2000 Ford Taurus. I Currently Have 135,000 Miles On It. Recently My "check Engine" Light Came On. I Had It Checked And It Came Back...

I Followed Your Response On A Similar Problem And When I Start The Engine With A/c On The Fans Run. I Cleared The Code And It Has Returned....

Engine Mechanical Problem 2001 Bmw Z3 4 Cyl Two Wheel Drive Manual Just Failed My Inspection Due To Above Code. States Secondary Air...

Which Is A: Secondary Air Injection Switching Valve A Circuit Malfunction. Now, I Wonder Should I Replace The Air Pump Only Or The Shut-...

Local Service Technician Stated "current Code: Leak Detection Pump Canister Vent Valve Solenoid High. No Tsb's Or Recalls....

The Code Was For The Fuel Cap, And I Changed That, But After A Few Miles The Light Came Back On With The Same Code. Was Tould It Could Be...

1998 Buick Regal 6 Cyl Front Wheel Drive Automatic I Recieve This Code When I Checked My Obd System. The Code Tells Me It's A...

Had Fault Codes That Say The Egr Valve Is Faulty, So I Replaced This With Another One It Wasn’t Genuine So Maybe That Is Faulty As Well...

I Have Had The Sensor Changed And Now Have This Code. Am Wondering What Needs To Be Done Now And If It Is Worth Repairing. I Have Over 150...