Tonight my car threw an engine light and it turned out to be p0304 cylinder 4 misfire. The second code was the same one just it said pending( i dont know what that means) so i cleared it and went for a ride around the block aand it did not read the code again. could this just happen randomly? and if my long term fuel trim is high (which i did not know) around +10 should i take of my intake. im not sure if that is dangerously high or not. thanks in advance.

 

probley just random, i get it a few times a year