Hello Fellow Cruiser Freaks! After the "check engine" light came on yesterday, I retrieved a diagnostic code of No. 28, which is the "post catalytic converter system" per the Haynes Manual. The manual said to check the post (after) cat converter oxygen sensor but I didn't think the 94 models had post cat 02 sensors and I didn't see one either? I did locate the main 02 sensor and 02 sensor heater electrical connections. Any suggestions on fixing this diagnostic code? Thanks.