Anybody Know what CODE 41 is??

I found code 41 in my Chilton Manual under OBD-1 Diagnostic Trouble Codes Applications. Thinking about it, my guess would be that the chart is generic for all OBD-1 and not our cars specifically. There is a chart for two digit codes as well as three digit codes. And I know that any leans codes I have every pulled on my car have been three digit. So some of you guys may be right.
- Justin