Wtf?????

Why would an o2 sensor cause the cruise to shut off?

I can see TPS, throttle position sensor, giving you a check indian light and shutting off the cruize but not an o2 sensor.

Swing into the nearest auto parts store and have them put the tester on for free and check the code.
I don't know if the TPS is integrated into the gas pedal or under the hood hooked to the other end of the throttle cable.