Speed control sencor on 2000 Chrysler 300M

I recently had my ECM replaced. After that my car started to get stuck in 2nd gear an my ingine light came on. I had it scanned at Auto Zone an it read P700. So i had my speed control sencors replaced(input and output)Then it drive fine until i tried to use my autostick. the inine light came back on an got stuck in 1st gear... what could be my problem?

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1 answer
Have you had the codes rechecked since the engine light came back on?