Martin Truex Jr. has failed pre-race inspection at Texas motor Speedway and will have to start from the rear of the field.
NASCAR announced that the sanctioning body confiscated the rear spoiler of the No. 19 Toyota.
Truex will lose 20 driver points, 20 No. 19 team owner points, and crew chief James Small will not be allowed to crew chief in the Autotrader EchoPark Automotive 500.
Truex was set to start the race in sixth.
Truex, the 2017 champion, is now 51 points behind the playoff cut line.
Truex has made the Championship 4 race as a title contender in each of the last three seasons.