Erasing Trouble Codes Using MIL
WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
Trouble codes can only be manually erased by using DRB. After 50 ignition switch cycles (ON-OFF-ON), PCM memory will erase any trouble codes that have not reoccurred.