A spokesman for the Ministry of Security of Santa Fe, the province Rosario forms part of, released a statement following the incident.
The statement said: "The Ministry of Security of Santa Fe informs, with regards to the video in which two police officers appear having sex in a patrol car, that the Violence and Institutional Office of the local State Prosecutor's Officer led by Karina Bartocci, has been informed.
"Also a disciplinary probe which will involve the suspension of both officers has been initiated.
"We condemn this extremely offensive incident for the people of this province, given that we're dealing with public servants on duty who should be protecting the lives and security of our people."
This isn't the first scandal to come out of Rosario's police force this month.
Earlier in February, footage emerged of two female community police officers in Rosario celebrating the seizure of a cannabis plant.
One of the women was filmed laughing and joking as she held the massive plant up and shouted: "Who wants to smoke this? This is what we took off someone we stopped and searched.
"We asked him, "Do you want to run off home and leave us with this or do you want us to take you into custody and he wisely decided to leave it with us?" And this is what we got."
Both were ordered to hand in their weapons and uniforms as part of an ongoing probe.
In December a police officer in the Argentinian capital Buenos Aires was filmed snorting what appeared to be cocaine inside his patrol car while on duty.
The cop was still wearing his bulletproof vest when he bent his head down to take the drugs as messages came across his police radio.