Pontiac Grand Am P Codes (Powertrain) P0400 - P0499

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...

Replaced Purge Solenoid, Evap Valve Solenoid, Got A P0446 This Morning While Car Was Warming Up.

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????

Returned To Dealer Repair Services Four Times Between Mileage 90,116 And 90,464 To Replace Gas Cap, Purge Line Harness, Evaporative Canister...

What This Two Sensor Are For Po403 And Po405

P0420 Reads On My 2002 Pontiac Grandam V6. I Recently Had A Head Gasket Job Done (and Egr Valve And Thermostat And Catalytic Converter Put...

2001 Pontiac Grand Am 3.4l V6 P0420 Catalytic Efficiency Bank 1 Code Was Tripping Every 15 Miles. After Replacing The Thermostat Which...

The Car Starts Up Fine Will Idle Fine, But When I Go To Drive It Starts Cutting Out And Stalling. Got Two Error Codes P0440 And P0442. Has...

Hello, I Have A P0420 And A P0410. I Know That The P0420 Is For The Catalytic Converter And The P0410 Is For The Air Pump Injection System....

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...