An off-duty city traffic enforcement agent was arrested for leaving the scene of a Bronx accident, but not after telling the motorist she rammed into that she was “NYPD,” police said Friday. Robin Artis, 27, was grabbed by police Thursday for the July 17 accident at E. 189th St. and Cambreleng Ave. in Belmont. Artis allegedly rear-ended a double-parked car with its hazards flashing, breaking a rear reflector light and leaving some scratches, cops said. She stepped out of the car to look over the damage, but when the other motorist said that they wanted to call 911, Artis said “I’m NYPD” and drove off without sharing any information. The other motorist suffered some back pain in the crash, police said. Cops charged Artis with leaving the scene of an accident with an injury. She was given a desk appearance ticket and is expected to answer the charges in court in a few weeks. Artis earned $46,234 last year as a city traffic agent, writing parking tickets and moving traffic along, according to city records. Traffic enforcement agents are overseen by the NYPD, but they do not carry weapons and have no arrest powers, according to officials.