P0301 toyota rav4 P is a relatively common Toyota Rav4 trouble code It stands for P is certainly a cause for concern, and can be a threat to the drivability the Toyota Rav4 The nice thing about it is that the P has tracked the problem to a particular cylinder, which makes diagnosing the problems simpler than Pwhich means that the cylinders are randomly P0300 TOYOTA code tech notes The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring Start by checking for intake leaks, intake gaskets are commonly caused by multicylinder misfiring Here are the chronology put a bottle of techron on in an empty tank, and filled 12 gallons drove car until half tank emptysituation did not improve Scanned codes P0300 , P0301 and P0304 swapped 4 and 6 coils, got P0300, P0303 and P0306 cleared codes, replaced coil (#6) todayafter clearing and an immediate test drive check Toyota Rav4 00 P0304 Misfire Detected Cylinder Toyota Rav4 Repair P0301 code toyota rav4