P CODES (POWERTRAIN) P0300 - P0399 P0327 Questions

I Have Change The Knock Sensors Out And Harness. The Same Codes Keep Popping Up.

The Two Codes Came In After A Water Pump Replacement. Also, The Belt Tensioner And Fan Clutch. The Engine Runs Good, Idles Smooth. The 2 Ks...

My Check Engine Light Is On. I Had My Truck Scanned And It Is Reporting These Error Codes Po300. Po327 And Po440. Is There Something In...

My First Question Pertains To The Check Engine Light. When I Scan It, The Code P1404 Comes Up, Which Is An Egr Valve Code. I Replaced The...

Yellow Light Display Indicating Code Po327. I Replaced Knock Sensor; Cleared Code, And Within A Mile, Yellow Light Came On Again. What Is...

I Have A 1999 Chevy Truck With A Rebuilt Engine 4.3l V6. Engine Light Coming On For Awhile And Then Going Off For Awhile. The Engine Has...

After Starting Engine At 'd' Position Car Moving Good But Few Minutes Later Car Not Moving And Pick Up Not Increasing And Engine...

Engine Performance Problem 2005 Toyota Camry 4 Cyl Two Wheel Drive Automatic It Was Suggested To Me To Put Sea Foam In The Gas Tank...

Engine Light + Blinking 4lo + Slip Light On,but The Car Is Running Fine. The Diagnostic Tool Shows The Error Code P0327: Knock Sensor 1...