I recently purchased a '99 Dakota 4x4 Sport with 162,000 miles on it. The brake and ABS lights come on from time to time. Has anyone seen or had this problem before. I first thought it had something to do with the emergency brake. The brakes were done recently by the previous owner. Also the Check engine light stays on all the time. The truck runs fine, but I would like to get this resolved. Autozone says that the O2 sensor, catalytic convertor, or something to do with the left bank maybe the problem. Any help would be appreciated. Thanks in advance.