Honda will quit Formula One on Friday, BBC Sport understands. The Japanese car manufacturer is set to announce that it is selling its team, with a view to closing the team down by the end of March if no buyer is found.
Sources told BBC Sport the team were "optimistic" they would continue, but no investor had yet been found.
However, according to the Reuters news agency, team bosses Ross Brawn and Nick Fry fear Honda could close the team within weeks.
According to a Reuters source, Brawn and Fry told a meeting of the Formula One Teams' Association: "They have a month to find a buyer, otherwise they are closing the team."
Honda, who recently cut road vehicle production as a response to the global economic crisis, are expected to make an announcement regarding the team's future at 0500 GMT on Friday.
The Japanese giant's F1 team endured a deeply disappointing 2008 season on the track, earning just 14 points, leaving them the lowest of the nine points-scoring teams.
In turn Britain's Jenson Button, who drives for Honda, found himself ranked 18th in the drivers' list, contributing only three points.
Only four drivers, each without a point to their name, ranked below him. Team-mate Rubens Barrichello earned the remaining 11 points.
Honda initially entered F1 as a constructor in the 1960s, withdrawing at the end of 1968.
The company returned to F1 in the 1980s as an engine supplier, then purchased a stake in the BAR team from British American Tobacco in 2004.
Honda bought out British American Tobacco in 2005 to form the Honda team for the 2006 season.
While the team finished fourth in the 2006 constructors' championship, they have since struggled to make an impact.
http://news.bbc.co.uk/sport2/hi/motorsport/formula_one/7766092.stm