A ScangaugeII will read that for you. If you have an Android or I-Phone, they have some apps that will read engine parameters.

 

Guy I know stopped n it is the ficm.he had snap on reader

 

Put new ficm from junkyard was supposed to be tested. Truck barely started. After being plugged in for a couple hrs. Lot of cranking. Got my software working got lots of codes n on board tests still say miss fire in all cylinders. Po261 po267 po671 po672 n bunch other stuff that is all software stuff codes that of tests that can't be performed