The companies are trying to avoid repeating the mistakes of Volkswagen, which covered up its use of so-called defeat devices that could adjust emissions to comply with regulations when a car was being tested, but ease back in normal driving conditions.
Ettevõtted üritavad vältida Volkswageni vigade kordamist, kes vaikis maha nii-öelda petuseadmete kasutamise, mis võimaldasid kohandada heitgaaside näidu auto testimise ajaks regulatsioonidele vastavaks, aga tõmbusid tavalistes sõiduoludes tagasi.