Try to reset throttle body again. Foxwell NT 510 should do it. Also you should reset ECU, using Foxwell scanner.

If your Honda Odyssey has a faulty throttle body, it can cause it to run terribly. Common symptoms of a bad throttle body include dirt and grime, the check engine light, and an erratic idle. Your Odyssey's throttle body controls the amount of air that enters the engine.

My 2006 Ody with 238,000 miles on it has been having throttle issues for a while now. Intermittently, I would get a stuck throttle - (This often happens when accelerating up a highway ramp or from a dead stop).

The usual complaints led me to take the time to clean the throttle body: hesitation on start, sluggish throttle, etc. I decided to create a simplified step-by-step guide for someone with limited automotive skills to have the confidence to tackle this job.

P2101 means that your Odyssey’s PCM has noticed a discrepancy between the throttle input and the actual throttle position. P2101 indicates that the throttle is not opening and closing in the way that you, the driver, are requesting it to. The signal is, therefore, “out of range.”