The agency said Friday it's been in contact with local authorities and Honda "to understand all of the facts related to this tragic incident."
Sixteen-year-old Kyle Plush died Tuesday after becoming trapped inside a 2004 Honda Odyssey. A coroner says Plush died of asphyxiation due to "chest compression."
Plush made two 911 calls Tuesday afternoon begging for help from a parking lot at Seven Hills School in Cincinnati. Two Cincinnati police officers and a Hamilton County sheriff's deputy searched but failed to locate him.
A Cincinnati police spokesman said Friday the department has verified that the minivan wasn't subject to recalls.