Buick P Codes (Powertrain)

Performed All Egr Tests. Still Getting P0404. Same Test Results On Three Different Units-2 Used, 1 Brand New. Results As Follows,(no...

I Have A Code Of Po113, Bank 1 And My Car Misfires Like When I Drive The The Car With The Air Conditioner On? Does The Pump Have A Filter In...

Check Engine Code P0420.

Random Misfire.

While Driving With The Rpms Around 2000 The Car Will Jerk And Drop To 1500 Rpm Then Back To 2000. It Does This Repeatedly, And Upon Heavy...

I Have The Car Listed Above Custom Model. The Transmission Is Not Shifting Right. It Will Go Into Gear To Drive But While Driving Down The...

I Don't Know Much About Cars, Or The Symptoms Of Anything Faulty, So I'm Hoping Someone With More Expertise Can Take All The Info And Give...

I Have A Po442 Small Leak In Evaporative Emission System. How Do I Check Cannester And Purge Valve? Or Do I Just Replace Both? If...

My Check Engine Light Came On And, As I Tried To Accelerate - It Seemed To Not "catch". The Code That Showed Up Was P0300. They Thought...

Engine Mechanical Problem 2002 Buick Century 6 Cyl Front Wheel Drive Automatic 50 000 Miles These Are The Codes That Came Upp P0440-...