2004 grand am quick temporary power loss

[RedneckFromHell]

My friend has been having a quick temporary power loss at 70 mph with steady throtle in her 2004 grand am. I haven't had any luck in finding out what the problem is so if anyone can help it would be greatly appreciated. Also she had autozone run a diagnostic check and she said it brought up something about her O2 sensor but she is not experiencing any idol problems or fuel mileage loss. Thanks.

 

[melsg5]

please provide the code. when is the last time the fuel filter was changed? have you run a fuel pressure test? have you checked the air filter?

 

[RedneckFromHell]

She lives 2 hours away from me, I'm going there this weekend. I'll be sure to check on those things and get back to ya. Thanks.