I have a 2000 Hyundia elantra, the engine light came on, so I took it to Autozone and here is what they told me, I am hoping someone can decode it for me. The car doesnt seem to be running bad at all, I would not of know anything was wrong if it werent for that engine light. Anyway here is what the code was for: PO722: Output Speed Sensor Circuit No Signal By the way, this light came on right after I tried to back out of our driveway during that bad snow and got very stuck in the process. Anyone know if this is a major deal, or just a glitch. The light has since gone off, and I am not sure what to do. Thank you.