Okay i did the induction cleaning and the ses light came on got the codes read they were 300 308 and 1319 i know the 308 and 300 are mis fire codes but the 1319 dosent even register for a land rover i was getting ready to change the plugs and wires when the ses light went off no more codes im kinda confused should i go ahead and change the plugs and wires or is this a normal thing when you do an induction cleaning

 

That is normal, don't worry about it, you just misfired more then normal when blasting out the carbon.