Help! I have a 1994 toyota camry 6 cylinder. I get a check engine light and codes 500 and 720 and the o/d light flashes. Also, when I start the car in the morning the speedometer jumps up to 30 and slowly goes down to zero. As I drive, sometimes it will miss a shift and I have to take my foot off the gas. I was told that I should change the vehicle speed sensor. I swapped the vehicle speed sensor from a 1997 toyota avalon 6 cylinder (same part) and still had the same problem. I ordered a used instrument cluster and installed it. Still got the check engine light and the trasmission still did not shift correctly but the o/d light did not flash. I took the car to a transmission shop and I was told it was the vehicle speed sensor and that I should start with that. Having already swapped it out, I don't know where to go next. I was wondering if you had any idea as to what I should check next.