Power loss under load at operating temperatures

I have a used, high mileage Honda CRV that has been fairly well maintained and exhibited no real problems so far.

Lately when driving, the acceleration seems to be very poor, taking a while to reach speed even while RPMs are increasing. There seems to be a delay between opening the throttle with the gas pedal, and the engine revving and speeding up.

Additionally, it feels like the vehicle kind of chugs or thunks into gear when it is manually shifted (for example from reverse into drive) or automatically shifted (when the transmission automatically shifts).

This could be two distinct problems, or part of the same thing, I am not sure. 7 months ago, the computer threw a transmission code. The dealer I purchased it from wanted me to buy a new transmission. I took it to a transmission shop for a second opinion, and the guy working there told me it looked like the transmission was operating fine. I don't know for sure what the code was, and it has not been thrown since.

Please let me know if you need any additional information, or if I can clarify for you. Thanks!

Darnit, that is a bummer, but I will take it back in to get looked at. Thank you for the help!

I found in my paperwork the code that was pulled from the computer, I guess it was P0730, that the gear ratio was incorrect or irregular.

Just off-hand, if it hasn't come back up again, what do you think the severity level of the issue might be? I don't know if I should look at getting it in within the next week or two, or if it might be able to wait till the end of the summer to scrounge up some more cash.

I've just been advised by a mechanic that one cyclinder has zero power and another is at 40%.
What caused this problem?
What should it cost to repair in Fairfield CT?