PLA doesn’t print well at 230. 230 is ABS temperatures, you usually want PLA much, much colder than that. usually around 210 at the most. Different materials have different properties, and the color of the filament makes a difference as well due to the chemicals used (for example white filament prints around 5c colder possibly due to titanium dioxide used as the colorant. There are also many different formulations. PLA from one manufacturer may be 20-30% different than the PLA formula from another factory, even for identical colors. Differences in the amount of filler, binder, etc. make a huge difference when printing, and you will often find the cheaper filaments use much more filler than they should, because it is cheap.
Leaking at 160 does seem a bit low though. There are a couple things that can cause that. An air break in the tube between the heater block and the main hexagon barrel, trying to print with 1.75mm filament without adapting your hotend for that, a failed barrel cooling fan, or possibly a thermistor failure. Usually a thermistor will completely fail rather than partially fail though. Thermistors are cheap so you can swap one out for about a dollar. The resistance values you can read with a multimeter should also be somewhere in the forum if you want to check it.
It can be useful to keep a pair of pliers around to grab plastic ooze as it comes out to save your cleaning pad.
Another thing that can cause leveling issues is if one of the washers has come loose from the bed and is no longer conducting electricity, so that’s a good thing to check. The bed frame itself conducts part of the signal so they have to be in good working order for leveling to function properly.