P CODES (POWERTRAIN) P0400 - P0499

Error Code P0401. I Have Cleaned The Inlet And Exhaust Tubes And Replaced The Egr Valve But The Light Comes Back On. I Used A Map Sensor...

Car Was Running Fine Then All Of A Sudden Check Engine Light Comes On And Car Will Turn Over But Will Not Start Bought A New Battery Put It...

I Need Instructions On How To Go About Repairing The Egr Error Code P0401 In My 1998 Automatic Honda Civic Coupe Hx. I Already Have The...

My Suv Shut Off While Driving And Won't Start Back. Fuel Pump Works Gets Fuel And Fire. I Let The Pump Build Up It Wants To Start But...

I Have A 2000 Vw Golf 1.4 L 16 V Engine Code Is Axp. There Is 60,000 Miles On The Car. I Currently Have A Fault Code P0401 Exhaust Gas...

1996 Mercury Cougar 4.6 V8 110000 Miles. What Problem Might I Have After P0401 Code Came Up?

Engine Performance Problem 2002 Ford Escape 6 Cyl Four Wheel Drive Automatic The Catalytic Converter Got Bad. It Was Taken Off After...

I Had Random Misfire Code But I Fixed It By Replacing A Faulty Coil. I Have No Miss, But I Now Have A Po420 Code. Replaced Up And Down...

My Check Engine Light Came On With The Code Of Po420. Yesterday I Got The Flex Pipe, Extension Pipe, Resonator, Axle Pipe, Muffler And...

Check Engine Light Is On Engine Code Po420 Catalyst System Efficiency Below Threshold ( Bank 1) What Does This Mean?