I took a look through Publication 1346 (reject codes) and couldn't find anything that would reject for vehicle year on line 1. There's reject 1271 which indicates that line 18 less line 19 cannot be less than $0. That is, there must be some tax left after personal credits to reduce with the 8910 credit. And there's reject 1274 which indicates the date placed in service must be later than 12/31/2009 and before 01/01/2011.