Cherokee Sport 2001 with 60k

Amber Check Engine light came on this morning.

Question:

1. Any idea what can cause that to come on. Many times the light has gone
on on my 1996 Dodge Dakota
with 135k and it's a O2 sensor.

2. Can the vehicle be driven for about 15 miles to the mechanic after the
holiday weekend?

Thanking all in advance.
Eddy