P CODES (POWERTRAIN) P0400 - P0499

I Recently Replaced The Exhaust Manifold Catalytic Converter On My Truck. While Doing So I Had To Move The Secondary Air Flow Check Valve So...

I Changed Out The Vapor Control Valve Canister And I Still Have The Error Code. Any Advice?

I Got The Error Code P0455, Took Car In And They Said It Was A Loose Gap Cap. They Cleaned The Cap, And Tightened (so Tight I Could Barely...

I Had Code P1131, Drove Around With It For 3,000 To 4,000 Miles With It While Figuring It Out. Put A New O2 In Bank1 Upstream. 1131 Code...

The Check Engine Light Turned On. Went To Autozone To Get The Printout To Find Out What It Was, And It Come Up Evaporative Emission System...

I Had Changed My Gas Cap Twice Even Both The Purge And Canister Vent Valves So I Was Thinking What Else Could Be The Problem To Get Rid Of...

The Code Come Up Po456 And I Just Wondering Where The Leek Could Be On My Car.

Dear Technician, In My Car Listed Above I Very Often Have The Check Engine Soon Notification With This Number: No. P0446 And Text: Evap...

Car Gives Codes P0301. I Have Replaced Plugs, Wires, Coils, Aic Valve, Cleaned, Maf Sensor, Throttle Body. Still Have Same Problems...

I Have A P0440 Code On Saturn Vue 2008. I Got A Smoke Test Done & No Leak Was Found. I Also Noticed Some Rattling In The Front Of Car A I&#...