PONTIAC P CODES (POWERTRAIN) P0400 - P0499

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...

Checked The Computer And It Is Coming Up With A P0440 And P0440 Pending Code With The Cat Flashing On The Scanner. Do You Know What Could Be...

Have An 04 Sunfire, Check Engine Light Keeps Coming On With The Code P0442. We Have Changed The Gas Cap And The Vent Valve, There Is No...

I Have A Po442 Code, I Took My Car In And They Fixed A Proportion Valve. And It Still Keeps Coming On As A Code Po442. Any Help?

My Service Engine Soon Light Came On. Code: P0401, I Bought A New Egr I Had The Code Reset. On The Way Back Home, The Service Engine...

Good Afternoon, My 2004 Grand Am Has A P0420 Code. I Replaced The O2 Sensor That Is In The Exhaust Manifold. The Dealership Told Me That...

Is There A Picture Of Where The Sensor Is On The Fuel Tank, A Diagram Or Something

I Have A 98 Pontiac Thansport, It Has A P0420 Code I Cant Figure Out What I Would Look For In The #1 Bank Doug

What This Two Sensor Are For Po403 And Po405

P0455 Code Evaporative Emissions System Leak Detected Large Leak, I've Had The Cylinders Cleaned They Were Completely Clogged With It...