Kyle Larson's crew chief Chad Johnston has been suspended by NASCAR through June 15 after lug nuts were not properly installed after Monday's NASCAR Sprint Cup Series race at Pocono Raceway.
According to the NASCAR rule book, Johnston and the No. 42 Chip Ganassi Racing team violated sections 12-1; 10.11.3.4 a; 18.104.22.168.1 p for lug nuts not properly installed.
Johnston will miss this weekend's event at Michigan International Speedway and has been placed on probation through Dec. 31. He has also been fined $20,000 for the P3 violation.
Teams of Regan Smith, Matt DiBenedetto and Jamie McMurray all received written warnings from NASCAR after failing pre-race inspection.
The teams of Aric Almirola, Danica Patrick and Ty Dillon also received written warnings for failing pre-qualifying inspection.