P CODES (POWERTRAIN) P0300 - P0399

Running Rough At Idle And High Rpm's Engine Codes Are Po300, Po 301po303 Also Has Random Misfires. Replaced Sparkplugs Problem Still...

I Took My Car Into The Shop. They Tested It And It Came Up With Po336. Replaced The Crank Sensor. Drives Great Now. Or At Least Alot...

Vin #1gcdm19w7xb149698 Getting Trouble Code #'s Po121/305/420/1870/420 Pending. The Dtc Giving Me Freeze Frame Info Is Po300 (random...

I Replace The Fuel Pump End Tune Up Replace All Coil Check The Firering Order Start Wen I Step The Gas Pedal Hessetate End Stumble End Died...

I Am In The Process Of The Diagnosis Of A Code Po300( Random Misfire)-i Am Using A Scanner And The Coolant Temp Sensor Registers The Same...

Computer Problem 2003 Hyundai Accent 4 Cyl Front Wheel Drive Manual 54.000 Miles The Code Po300 01/03 Code Has Shown Up Ive Changed...

I Have The Code Po300 And Ive Tried To Fix It And Spending Countless Money On Parts I Don't Need Cause Its Not Helping The Misfire Issue...

I Recently Had A P0421 And A P0300 Code Pop Up. I Got Both Oxygen Sensors And The Catalytic Converter Replaced About A Week Ago. The P0421...

Son Took This Vehicle To A Gm Service Shop Due To Running Rough, Very Poor Gas Mileage And Gas Smell After Operating. Shop Checked Coil...

I Have Setting Cam Sensor Code, Checked Wired And Have Ground And 5 And 12 Volts, Wires Was Cut When I Got Car And Believe I Got Them In...