Buyers who had been considering a new vehicle using refunds from the Cash for Clunkers program may want to take another look at used cars in New York as the program faces a funding shortage.

The appropriated money ran out in less than a month, and although the House of Representatives passed a bill authorizing a new infusion of money, there are some doubts that the Senate will allow for more than $2 billion to be approved before Congress goes on recess for a month, reported the New York Times.

Senators Dianne Feinstein and Susan Collins issued a bipartisan statement saying that they would not approve any more funds for the program unless the mileage numbers were increased, limiting the options of those who had been planning to make an upgrade from used cars in New York, reported the newspaper.

Car dealers had told buyers beginning on July 30 that the program had been suspended, and although the government has promised dealers that they won’t be asked to pay any refunds themselves, the head of the National Automotive Dealers Association is cautioning members to wait, according to the Detroit Free Press.