Los Angeles County Superior Court Judge Cynthia Ulfig delayed sentencing for Dykstra, 48, until March 7 to allow him to finish the program, the Los Angeles Times reported Friday.
"He is enrolled in a drug and alcohol program and progressing well," the judge said.
Dykstra was convicted of the grand theft auto charges after he and two others tried to lease high-end cars from multiple dealerships by providing phony information and claiming credit through a fake business, authorities said.
Dykstra was arrested April 14. Authorities said they found cocaine, Ecstasy and somatropin, a synthetic human growth hormone, in his home.