P CODES (POWERTRAIN) P0400 - P0499

Catalyst System Efficiency Below Threshold Bank 2. What Is The Likelyhood That This Is Just The Oxygen Sensor Gone Bad Versus The Front/...

I Found Out That The Code P 0455 Means Evaporative Emission Control System Leak Detected. Could Someone Please Explain To Me What This...

Tried Cleaning Both Idle Control Valve & Egr Valve As Y Ou Suggested. Did Not Help, Both Were Fairly Clean And Functional. Also If Anyone...

This Code Is The Only One That Keeps Appearing Pending Twice In My Car, Now It Makes A Loud Funny Vibration Noise When You First Press The...

Comes Up As Evap Monitor Leak (small) Detected Where Do I Look For This And How Do I Fix? Any Help Is Appreciated, Thank You.

I Got The Code P0456 A Couple Weeks Ago And Went On To Fix It. I Changed The Spark Plugs, The Wires And The Air Hoses That Are Visible And...

Engine Performance Problem 2003 Mitsubishi Lancer 4 Cyl Front Wheel Drive Automatic I Have Mitsubishi Lancer 2.0 2003. I Am Gettting...

I Get Intermittent P401 On My Grand Caravan (flex Fuel). It Comes On Then In A Day Or Two Disappears. Other Symptoms Are Erratic Idling...

I Bought This Van On Facebook And This Specific Code Has Been Giving Me A Headache. So Far I've Change The Egr Valve, Dpfe Sensor, And...

Vin 1fmdu32p2vua38455 Can Not Find Dpfe That Sends Code To Computer. All Suggestions Point To Replace Will Fix Problem. Does It Have One Or...