I just recently bought this S70 and I am having some sensor issues. Numerous of my warning lights come on and go off randomly. Speedometer and odometer starts and starts randomly. My speed is also off. I've visited autozone for the free computer ck. Here is what the print out shows. Output speed sensor, front ABS speed sensor. I'm just trying to get a little advice pinpointing each problem. i don't wanna be buying sensors I don't need. Any help would be grateful.