Our '04 Accord V6 automatic coupe has been acting up lately. Initially the traction control lamp came on in dry no-slip conditions, and then the idle under load started acting strange. The TC was turned off and then back on, and returned to working normal, however when the vehicle is under load (i.e. driving on the highway, etc) there is a noticible surge as well as loss in power. It feels as if there is something wrong with the drive-by-wire system, idle, etc.

Can anyone suggest what is causing this?

Thanks