Also, the other day I cleared my Self Level Suspension Inactive code that had come on at the first really cold day here in Dallas and never reset itself. The code kept coming on immediately after start up.
I used a Creator C310+ scan tool and found the code (I since forgot what it was but it was something like "Accumulator Pressure"). I reset it a couple days ago and it has remained off.
While not a coding device, the Creator 310+ was/is a good solution tool for me to have on hand and was pretty reasonable $50 Buy It Now from eBay.
Mike