Six of the top seven manufacturers on Tuesday reported year-to-year sales increases in February, but all fell short of expectations.

With more than three-quarters of the industry reporting by midday, total U.S. sales were up 4.7 percent from the previous February. Eleven analysts surveyed by Thomson Reuters had expected a year-to-year gain of 7.1 percent.

Toyota said it expects the auto industry to report annualized sales of 16.2 million vehicles for February, which would widely miss estimates. The 48 economists polled by Thomson Reuters, on average, predicted annualized sales in February of 16.7 million vehicles.

Most companies blamed extreme weather conditions in the U.S. Northeast and Midwest, and some pointed to a spike in fuel prices toward the end of the month.

"There was definitely a slowdown" in sales after February 20," said Mark LaNeve, Ford Motor Co's (>> Ford Motor Company) U.S. sales vice president. LaNeve said Ford's fleet sales also fell more than sales to retail customers.

John Krafcik, president of research firm TrueCar, said the extreme weather likely had a greater impact on sales of cars than trucks.

General Motors Co (>> General Motors Company) said U.S. February sales climbed 4 percent from a year ago to 231,378 cars and trucks, while Ford's sales dropped 2 percent to 180,383. Fiat Chrysler Automobiles (>> Fiat Chrysler Automobiles NV) posted an increase of 6 percent to 163,586 vehicles.

Toyota Motor Corp (>> Toyota Motor Corp) said sales were up 13 percent to 180,467 cars and trucks. Nissan Motor Co's (>> Nissan Motor Co Ltd) sales were up 3 percent to 118,436, and Honda Motor Co (>> Honda Motor Co Ltd) reported an increase of 5 percent to 105,466.

Tempering analysts' bullish expectations for car sales, U.S. consumer sentiment fell from an 11-year high in February, weighed down by the unusually severe winter and lower gasoline prices, according to a monthly survey released on Friday by the University of Michigan.

Despite the weakening of sentiment, "all other major economic indicators point to a stable economy that will continue to grow slowly," said Kelley Blue Book analyst Alex Gutierrez.

The average vehicle transaction price in February fell slightly from a month ago to $33,299, according to industry researcher Kelley Blue Book, but the average price is still $1,145 higher than a year ago.

Average per-vehicle incentive spending by carmakers remained steady at $2,623, according to TrueCar.

Domestic luxury brands took a beating in February, with GM's Cadillac down 13 percent and Ford's Lincoln off 7 percent.

Continued low fuel prices dented sales of electrified vehicles, with the Chevrolet Volt hybrid sliding 43 percent, the Ford C-Max hybrid off 26 percent and the Nissan Leaf down 16 percent.

Sales of small cars and family sedans slid last month, while big trucks continued to show strength. GM's full-size Chevrolet Silverado and GMC Sierra pickups were up 24 percent and 6 percent, respectively.

The two GM trucks outsold Ford's F-series pickup, which is ramping up to full production and had a modest decline of 1 percent. Chrysler's Ram pickup was up 7 percent.

(Additional reporting by Bernie Woodall in Detroit; editing by Jeffrey Benkoe; and Matthew Lewis)

By Paul Lienert and Ben Klayman