P CODES (POWERTRAIN) P0400 - P0499

I Have A 1998 Dodge Neon Sohc P0401 And Wanted To Know How Likely It Is That It Is The Egr Valve

Hey. I Have Obdii Scan Code Of P0420 And I Looked It Up And Has To Deal With A Low Bank 1 Cat Conveter. What Does This Mean? Do You...

My Minivan Shakes When On The Freeway Going Over Fifty Mph. If I Take Foot Off The Accelerator The Shaking/vibration Stops And Engine Runs...

Okay, My Car Has The Coded Listed Above. I Changed The Gas Cap, And Still Have That Code. Maybe The Charcoal Canister? Also When I Get Low...

Hi. Well My Question Is The Code P0420, What Would Cause This Code To Show Up. I Have Went Through And Checked For Vaccum Leaks And...

I Have A Check Engine Light And Got P0420. I Know It Needs A Catalytic Converter But I'm Not Entirely Sure Sure Which One. It Just Says Bank...

Greetings, First Time Poster. I Have A 2000 626 With About 64k Miles, A 2.0 And Auto Trans. I Have Been Working The P0420 Problem...

Engine Mechanical Problem 2004 Ford Taurus 6 Cyl Front Wheel Drive Automatic I Have A 2004 Ford Taurus Se Sedan. My Check-engine...

Hi, I Recently Scanned My Car And The P0420 Code Came Up. It Says It Has To Do With The Catalytic Converter. Does Anyone Know Of How To Fix...

Just Had The Catalytic Converter Replaced Yesterday, And After 30 Or So Miles The Check Engine Light Came Back On, My Obd Reader Gave Me...