The injured man was another police officer in the patrol car.
The constable's lawyer, Todd Simmonds, told the court today his client will seek a discharge without conviction.
She is now due to be sentenced in April.
Inspector Jared Pirret, the acting District Commander for Counties Manukau, earlier told the Herald the officer was on duty and attending to a priority incident when she crashed.
She drove through a red light at an intersection before crashing into another vehicle, Pirret explained.
The charged officer remains on active duty and no one else was charged over the incident, Pirret added.
Other Auckland-based police officers before the courts for alleged driving offences include a 31-year-old who was charged last year after an on-duty incident.
Andrew Dimitri Gan Zhilong is accused of driving dangerously along Symonds St in October 2018.
Superintendent Karyn Malthus, the Auckland City District Commander, earlier said the incident occurred while Gan Zhilong was undertaking "urgent driving duties".
Malthus, however, would not comment on whether those duties were related to a fleeing driver or another incident.
Zhilong is currently on restricted duties, she said, and is due to appear in court again next month.
Another police officer accused of careless driving last year was granted diversion after a crash in the Auckland suburb of Stonefields.