One problem related to emission control has been reported for the 2002 Nissan Frontier. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Nissan Frontier based on all problems reported for the 2002 Frontier.
While driving at about 70 to 75, under acceleration, I heard a loud noise and then the vehicle's rpms dropped down to about 500 as if the vehicle had no gas. I pulled over and turned the truck off I made sure that there was gas, and started the vehicle again and the check engine light came on. It seemed to run at about the correct rpm so I took it directly to the dealer. They had it for a week, and ultimately said that it was a bad oxygen sensor (the vehicle is supercharged) that caused the problem. I am not too confident in that explanation. God willing, the problem is fixed. The truck was only 3 weeks old at the time of the incident.