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The 40-year-old frontman was absent from court and entered his plea through a defence attorney.
Weiland was arrested last year in California after crashing his car. Police noted he showed "signs of impairment" and reportedly refused to take a blood or urine test.
After the arrest, Weiland was freed on $40,000 bail. He is due back in court for a pretrial hearing on April 4.
A spokesman for the Los Angeles City Attorney's Office said the singer could face a maximum of one year in jail due to a previous conviction for driving under the influence.
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