Method for managing a low-pressure exhaust gas recirculation circuit for an internal combustion petrol engine, the engine comprising at least one combustion chamber connected to an inlet line and an exhaust line, between which lines the low-pressure recirculation circuit extends, the exhaust line being equipped with a turbine for driving a compressor mounted in the inlet line, the inlet line comprising, downstream of the recirculation circuit, a butterfly valve for regulating the engine speed and the recirculation circuit comprising a flow regulating valve, the method comprising the step of operating the flow regulating valve as a function of a flow rate setpoint, and also the steps of: - detecting an operating parameter representative of a difference in pressure across the flow regulating valve using a sensor that has a precision threshold, - comparing the parameter against a threshold corresponding to a minimum pressure difference across the regulating valve, which minimum difference is determined in order to meet a requirement for flow rate in the regulating valve and/or to allow the flow rate in the regulating valve to be determined, - regulating the flow rate in at least one of the lines (3, 4) in order to increase the pressure difference across the regulating valve when the comparison between the operating parameter and the threshold corresponding to a minimum pressure difference across the regulating valve indicates that the pressure difference across the flow regulating valve is below the minimum pressure difference; the step of regulating the flow rate in order to increase the pressure difference across the regulating valve being performed by means of at least one additional valve (15, 25) mounted in the relevant line (3, 4), the method being characterized in that the regulating step comprises the sub-steps of: - determining a position setpoint (POScpe, POS 25) for the additional valve (15, 25) on the basis of at least the minimum pressure difference across the regulating valve, said minimum pressure difference across the regulating valve being used to deduce a pressure upstream and a pressure downstream of the additional valve, which pressures are used to determine a flow rate in the additional valve using a Barre Saint Venant model; and - correcting the position of the additional valve as a function of a measurement representative of the pressure difference across the regulating valve in the recirculation circuit. - detecting an operating parameter representative of a difference in pressure across the flow regulating valve using a sensor that has a precision threshold, - comparing the parameter against a threshold corresponding to a minimum pressure difference across the regulating valve, which minimum difference is determined in order to meet a requirement for flow rate in the regulating valve and/or to allow the flow rate in the regulating valve to be determined, - regulating the flow rate in at least one of the lines (3, 4) in order to increase the pressure difference across the regulating valve when the comparison between the operating parameter and the threshold corresponding to a minimum pressure difference across the regulating valve indicates that the pressure difference across the flow regulating valve is below the minimum pressure difference; - determining a position setpoint (POScpe, POS 25) for the additional valve (15, 25) on the basis of at least the minimum pressure difference across the regulating valve, said minimum pressure difference across the regulating valve being used to deduce a pressure upstream and a pressure downstream of the additional valve, which pressures are used to determine a flow rate in the additional valve using a Barre Saint Venant model; and - correcting the position of the additional valve as a function of a measurement representative of the pressure difference across the regulating valve in the recirculation circuit.