Toyota Corolla P Codes (Powertrain) P0400 - P0499

I Just Got Done Fixing My Car And It Is Running Fine. But Recently I Got Po455 And Po441 Codes. I Checked The Gas Cap And It Looks Fine. I...

Been Getting Misfires Recently. First Started With A P0302. Then Changed Out All Spark Plugs And Coil Packs, Then One Day Accelerated And...

I Am Getting A Check Engine Code Of P0420 From My Obdii Meter. I Know This Suggests A Problem With The Cat. To Eliminate Other Possibilities...

Hello Everyone, I Scanned My Car And The Error Code Is P0420. The Catalytic Converter Has Been Changed. The The Manifold Was Cut Open And...

Can Fuel Trims Affect The Efficiency Of The Catalyst. Long Term Is Around +13 Short Term Is Around +6. I Had A P0420 And Went Away.

The Previous Owner Replaced The Catalytic Converter Last Year. What Can Cause A Catalytic Converter Below Threshold? I Checked The Voltage...

Vin #2t1br32e85c416304 Showing Codes Po441/455/456 & Pending Codes Po441/455. Having Trouble Narrowing Down Where The Problem Is, Below Is...

Recently Had This Code Come Up. About Six Months Ago, Replaced The Vsv Valve, So I Am Guessing That Is Not It. Also, The Engine Seems To...

Engine Problem 2003 Toyota Corolla 4 Cyl Wheel Drive Type Unknown Automatic 88400 Miles I Had A Diagnostic Test Done At Autozone...

All Canister To Valve Hoses At Canister Are Ok, Some Rust On Vsv Casing (northern Car) Hole In Tube Feeding From Service Port (replaced)...