One problem related to cruise control has been reported for the 2009 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Nissan Altima based on all problems reported for the 2009 Altima.
Driving on interstate with cruise control engaged at 70 mph, speed dropped to approx 30-40 mph. I had the pedal to the mat and it wouldn't go any faster than 30-40 mph. Took it off cruise control, it still wouldn't pick up speed with the pedal to the mat. Suddenly car accelerated to approx 80-90 mph and would not slow down when I removed my foot from the gas pedal for at least 30-60 seconds. The speed then dropped again to 30-40 mph for about 5-10 minutes until it would take off again. It would accelerate for only about 30-60 seconds then would lose power again and wouldn't go above 30-40 mph. Tried to reset cruise control and still would not fix the issue. This is a safety issue and needs to be addressed ASAP. If travelling on the interstate in normal traffic, this could have caused an accident very easily. This happened late at night with no other cars on the road at the time.