random misfire engine code p0300

[Chevy Customer Svc]

hello everyone i have an aveo 2005 and im having trouble geting it to pass smog.. the engine light keeps coming on (flashing) i have already changed the EGR valve, spark plugs and wires, the coil pack and the gasket seal... what else can be wrong with this car!! i need some advice please... thank you

Common causes for a P0300 code are: faulty spark plugs or wires, faulty coil pack, faulty oxygen sensor(s), faulty fuel injector(s), burned exhaust valve, faulty catalytic converter(s), stuck/blocked EGR valve / passages, faulty camshaft position sensor and/or a defective computer.

I hope this information is helpful. I encourage you to have the vehicle inspected by a certified technician for additional assistance.

Louis (temporarily in for Vanessa)
GM Customer Service