What is error code 27 on a 1996 Chevy Cavalier?

A 1996 Chevy Cavalier doesn't use a generic OBD-II error code system in the same way as later vehicles. Code 27 isn't a standardized OBD-II code. The error codes on that year and model are usually manufacturer-specific and require a scan tool specifically designed to read Chevrolet's system from that era.

To find out what code 27 means, you'll need to:

* Consult a Chevrolet repair manual for a 1996 Cavalier: This manual will have a section detailing diagnostic trouble codes (DTCs) specific to your car's computer system. It will provide the meaning of code 27.

* Use a scan tool designed for older GM vehicles: These tools often use a different communication protocol than OBD-II. An auto parts store might have a compatible scanner, or a mechanic specializing in older vehicles will have the right equipment.

Without the proper documentation or tool, determining the meaning of code 27 is impossible.