Re: Or just vague requests
This is not "Joe's Software Shop", this is a large, German corporation that does business all over the world. Additionally, the ECU was manufactured and programmed by a third company (Bosch?) -- likely to VW's specifications. Which will be produced at the appropriate time. We've already heard the caution from the ECU vendor -- "make sure you don't leave this bypass code in for production, it's for test only"
To suggest that some disaffected software engineers somehow took it upon themselves to add the bypass code to the shipping product is to indicate complete ignorance of how these things are done.
Being a German company, process and procedures are likely paramount. So there will be specification documents with signature pages for every single thing in those cars. Of course, some of those documents may have been misfiled...and some signature pages may have fallen off. We shall see. And, there will be written test procedures for that ECU. Test procedures and code review notes. And a source control log.
But it sure wasn't a rogue software engineer who put that code in there because he wanted to bring down the company.