Court documents noted McKinney was stopped in Portsmouth Dr on July 31 at 3.12am.
When spoken to, the court heard, he showed signs of alcohol consumption and admitted to police he had been drinking.
He gave a breath-alcohol reading of 600mcg, more than twice the legal limit.
''In explanation the defendant stated that he only had a few drinks in town over several hours and believed that he was under the limit and would be able to drive,'' a police summary said.
Duty lawyer Ann Leonard said it was the first time McKinney had come before the court.
She explained the defendant was ''celebrating a good day'' and had consumed four drinks.
A Billy T Award nominee, McKinney won best male comedian at 2007's New Zealand Comedy Guild as well as the Reilly Comedy Award from the Variety Artists of New Zealand three years later.
The company that manages the defendant said he was best known for his impressions, including Arnold Schwarzenegger, Sylvester Stallone, Bert & Ernie and Elmo.
''It's his impersonations of the everyday folk like 'the Kiwi lady', 'that drunk guy' and his international accents that connect him with his audience,'' the website said.