I have never worked for an organization that overtly lied to a customer, but I have been involved in programs where leaders certainly were not forthcoming about product issues or problems encountered in development.
In my world, there is a clear distinction between Truth and Honesty.
My first encounter with Truth versus Honesty was as a test pilot on Eurofighter Typhoon. Early in its development, I encountered a severe oscillation during aerial refueling which ultimately led to a complete redesign of the flight control system, 7 years after first flight. The tale was one of blame and obfuscation, trying to hide from an issue that no one wanted to acknowledge or fix. At a time of very fragile political support for Eurofighter, a very bad news story could certainly have wreaked havoc on the program’s hopes for success. While the program ultimately solved the technical issue, the ethical dilemma tainted my view of Eurofighter and every subsequent test program that I flew in.