What does code exp 18 mean on a 2001 Oldsmobile aurora?

Code EXP 18 on a 2001 Oldsmobile Aurora typically indicates a problem related to the vehicle's electrical system or a specific component failure. It may refer to a malfunction in the vehicle's powertrain, transmission, or other critical systems. To diagnose the issue accurately, it's best to use an OBD-II scanner to retrieve more detailed diagnostic trouble codes. Consulting a qualified mechanic is recommended for proper troubleshooting and repair.