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 A P0300 Random Cylinder Misfire sets when the following conditions are met No CKP, IAC, MAF, TPS, or VSS sensor codes are present Engine speed is between RPM The ECT sensor shows the engine at normal operating temperature The alternator is charging the battery (system voltage between 916 Volts DC) P0300 Trouble Code Diagnosis Chevy Tahoe There are quite a few things that can cause the P0300 trouble code to trigger the Chevy Tahoe Here are the most common problems that will throw the code They are presented somewhat in order from most to least likely to be causing the code Low Fuel Pressure– If there isn't enough fuel getting to the engine, this will#1 A andre912 TYF Newbie Joined Posts 1 Reaction score 0 HI, yesterday I did a tune up on my Tahoe and after I did the plugs wires rotor cap and button ive had a misfire I took it to auto zone and they gave me a random misfire code ive never had this problem Codigo P0300 Chevrolet Todos Los Modelos Sintomas Y Solucion P0300 code chevy