Larson was not allowed to make a qualifying attempt on Saturday at Talladega Superspeedway and his No. 5 Hendrick Motorsports team could face further NASCAR penalties.
Prior to the start of the first round of Saturday morning's qualifying session, NASCAR announced Larson would not be allowed to participate and was sent back to the Cup Series garage.
A NASCAR spokesman said the team was penalised for making an unapproved adjustment to the roof rail of the car while it was being pushed from the garage to the grid.
NASCAR takes a very dim view of anyone making any material adjustments to the race cars after they’ve been through technical inspection. Any additional penalties for the incident would be announced next week.
Due to not taking part in qualifying, Larson will lose pit selection and have to start from the rear of Sunday’s race.
Larson had been on a roll of late, winning the pole at Richmond, Martinsville and last weekend at Texas.
Earlier this season, the Stewart-Haas Racing teams of Noah Gragson and Ryan Preece were each docked 35 points after NASCAR discovered altered roof rail deflectors on each car during inspection at Atlanta race weekend.
Source: Autosport