Various models including 2005 scion tc. ( nhtsa item number - 10008385 ). ... on with diagnostic trouble code (dtc) p0171 p0441, p2420 and/or p0455. ( nhtsa item ... Dec 25, 2020 · Relatively inexpensive code readers are available, some for less than $100 US Dollars (USD), but an automotive parts store or repair shop may be willing to check the code for free. These readers may also be able to clear the code from the computer, in some cases, turning the light off quickly and easily. But then, the 2008 Scion tC is more about achieving a balanced set of virtues. Thanks to a well-tuned suspension, its willing handling peacefully coexists with compliant ride quality. The 2.4-liter four-cylinder engine under the hood has meatier low-end torque than smaller-engined competitors like the Honda...P0455 code problem solved (I think). Jump to Latest Follow. P0455 Code solved. I had this code on a 1996 S500. I went through all the usual solutions posted on many threads without the problem being fixed - there was never any vacumm release when taking off the gas cap.