Japanese carmaker Nissan Motor Co. says that it uncovered instances of falsified data about exhaust emissions and fuel economy.

The automaker says that data falsification occurred on 19 models across five plants in Japan. The falsifications were found when the company carried out an internal check on employees conducting final vehicle inspections.

The incident reportedly will not lead to any recalls because the vehicles meet catalog specifications for fuel economy and emissions.

(Read "VW Scandal: When Good Engineers Do the Wrong Thing.")

Nissan found that employees misrepresented temperature and humidity data in testing chambers and manipulated emission data on carbon monoxide and carbon dioxide. The automaker says it has hired a law firm to investigate the matter.

In 2017, inspection irregularities led Nissan to recall about 1.2 million vehicles last year. It was the latest in a string of compliance scandals at carmakers, most notably Volkswagen (VW). In the case of VW, fabricated emission tests led to a number of criminal indictments and convictions in the U.S.