Nope. PG provides no throat hit. Try vaping PG by itself.
Nicotine causes the throat hit, plus other liquids, such as, ethyl maltol, and menthol crystals (I believe, but I don't vape menthol and haven't researched this one), among a few.
Higher voltage causes an increased throat hit but can also burn the mouth, roof, throat, and lungs, if five volts is used all the time.