I apologize if this is a repeat subject.
Driving to work the other day (Mon), my 2002 Altima seemed to downshift, and then it wasn't able to shift above 3rd gear. Since I was close enough to work I limped in and parked it. I went out for lunch, and the shifting problem had disappeared. I even drove on the highway, up to about 60 - 70 mph. On my way back to work, the same thing happened. A slight lunge forward, and what felt like downshifting into a lower gear. At this point the MIL light came on. I limped into work again and parked the car. Using the self diagnosis, I determined the two codes - 0720 (veh speed sensor A/T) and 1574 (ascd vhl spd sen). I took the car to the dealership after work, at which point the shifting problem had disappeared again. The dealership checked to find a problem the following two days (Tues and Wed), but was not able to find anything or duplicate the problem. They reset the light, and I picked up my car Wed afternoon. No charge for diagnosis by the way. I drove the car all day Thurs and on my way home from work Fri it started to downshift again. It seemed to correct the probelm itself because by the time I got home, it was shifting fine again.
SO here I am on Sat trying to find out if anyone has any advise or ideas on what could be happening?
Driving to work the other day (Mon), my 2002 Altima seemed to downshift, and then it wasn't able to shift above 3rd gear. Since I was close enough to work I limped in and parked it. I went out for lunch, and the shifting problem had disappeared. I even drove on the highway, up to about 60 - 70 mph. On my way back to work, the same thing happened. A slight lunge forward, and what felt like downshifting into a lower gear. At this point the MIL light came on. I limped into work again and parked the car. Using the self diagnosis, I determined the two codes - 0720 (veh speed sensor A/T) and 1574 (ascd vhl spd sen). I took the car to the dealership after work, at which point the shifting problem had disappeared again. The dealership checked to find a problem the following two days (Tues and Wed), but was not able to find anything or duplicate the problem. They reset the light, and I picked up my car Wed afternoon. No charge for diagnosis by the way. I drove the car all day Thurs and on my way home from work Fri it started to downshift again. It seemed to correct the probelm itself because by the time I got home, it was shifting fine again.
SO here I am on Sat trying to find out if anyone has any advise or ideas on what could be happening?
) suddenly lost power and turned off. The mechanical engineer was convinced that the problem was with the engine. The electrical engineer was convinced the problem was with the electronic controls. The IT specialist was convinced the problem could be corrected if everyone got out of the car and then back in.
