TOKYO — Toyota is in discussions with the National Highway Traffic Safety Administration about a possible recall in the U.S. and Canada covering several car models, including the Camry, for a problem with seat fabric.

The Japanese automaker has already halted sales of the problem vehicles, which are only those equipped with seat heaters, because the fabric may not clear flammability standards, company spokesman Naoki Sumino said today.

Affected models are the Camry, Camry hybrid, Avalon sedan, Avalon hybrid, Corolla subcompact, Sienna minivan, Tundra and Tacoma trucks sold since August 2012, when the fabric supplier was changed, he said.

He didn’t immediately know how many vehicles were affected.