Neal - critical = steady horn, severe = continuous beep, warning = 4 beeps every 2 minutes, caution = single beep. Sounds like your have a "caution" problem. There are 14 potential issues categorized as "caution" issues, 12 of them have the bell and engine icon. One is driver power low (faulty or low battery condition). The others relate to 5 VDC power low, CAN bus issues, MAP sensor issues, shift actuator issues, shift position sensor issues, neutral switch, no rpm detected, failure to reach op temp, TPS / MAP disagreements, TPI1 / TPI2 differential errors...... reads like you have a driver power issue!
Richard