Reports suggest other automakers have cooperated with France's diesel emissions inquiries.
Fiat Chrysler Automobiles appears to be facing more potential trouble in Europe over its handling of diesel emissions investigations.
France's fraud watchdog, known as the DGCCRF, had pursued an industry-wide emissions review in the wake of the Volkswagen scandal. The regulator raised concerns over several models including the Fiat 500X and Jeep Cherokee, leading to a deeper investigation over possible "aggravated deception."
The DGCCRF has now expanded its criminal probe, accusing the Italian-controlled automaker of obstructing the investigation, according to Le Monde.
In a statement to Reuters, FCA claimed it has cooperated with authorities so far and will continue to do so in the future. The company claims to be confident that the matter will be sorted out eventually.
The French news outlet suggests other automakers have cooperated satisfactorily with the DGCCRF.
Opel and Mercedes-Benz have been exonerated, while Renault and PSA still face suspicion of using improper calibration in their respective emissions control systems.