You are correct. It was carbon build-up on the throttle plate. They
cleaned the throttle body for $73. Not bad, but Honda Care would not pay.
They said it was just maintenance (cleaning) and since no part was replaced
and it was not due to a Mechanical Breakdown due to a defect... etc. I
think that is Bunk! and told them so. If it was just maintenance they
should have put it in the table of regularly scheduled maintenance items.

Spoke with the Service Manager to no avail. He said they have to do what
Honda Care tells them. Right. I then called the Honda national customer
service hotline and was assigned a case worker. He called the next day and
said Honda would reimburse me because they want me to be a happy customer
and to think about Honda next time I buy a car. So it worked out well in
the end, but I still think Honda Care should have paid. Before the case
worker called I had filed a complaint with the NHTSA, because it was clearly
becoming a safety hazard.

Sid