P0300 thru p0306 Hyundai - sonata

Question

Codes P0300 thru P0306 already had plugs and wires changed, camshaft po. Sensor, O2 sensor

Answer 1

Hi there,

Many times with these if there are multiple cylinder misfires, it's due to a faulty timing belt. If it's jumped time you will get multiple misfires. You may also have a leaking intake manifold gasket that would also cause this type of issue.