A Manhattan cop is under investigation for allegedly stealing property from perps after he was caught grabbing cash from an undercover officer posing as a drunk driver, law-enforcement sources said Tuesday.

Joseph Stokes — an officer in the Lower East Side’s 7th Precinct — was questioned for the alleged misconduct when he showed up to work at the precinct Tuesday afternoon, sources said.

Investigators are probing if he allegedly lifted more than $1,000 from an undercover officer who was posing as a drunk driver on Monday, police sources said.

The NYPD’s Internal Affairs Bureau had rigged the car with cameras before Stokes made the stop, the sources said.

Stokes’ partner is also being looked at, a law-enforcement source said.

Both their lockers at the station house had been taped shut as IAB investigates.