One problem related to other fuel system fuel gauge has been reported for the 2007 Toyota Prius. The most recently reported issues are listed below.
Vehicle does not achieve advertised fuel consumption performance. I have complained about this since the first service visit. Today a factory technician got unachievable results suggesting that our real world experience after 29,000 miles with the vehicle is normal. He claimed to have gotten 66. 984 mpg after a 42. 2 miles of 55 mph highway and "in town" driving, noting only that an out of fuel fault had never been cleared.