I have a speed sensor, yes. About the CEL, I just found out that the light bulb burnt out because out of curiosity I took out the gauge cluster and wanted to check the bulbs just in case and it turns out the CEL bulb was indeed burnt. I've taken the car to Autozone and Discount Auto and neither places do OBD-1 cars (1994 GS-R). Took it to Goodyear and they want $49.99; of course I declined. I'm gonna try the "paper clip method" from Vega's site see if that works and if it is a 'Code 21' and maybe other codes. Thanks for everyone's help.