Though I have no personal experience, I recall some conversations that if the dealer has to swap the PCM which could/would trigger the P1400 code, but because it is annotated in service records that the PCM was swapped, the warranty is not void. I could only assume the stage programming upgrades may fall under the same lines.
Are they able to detect the date which it was triggered? That's a good question too. I am curious to real answers to your question too.
Are they able to detect the date which it was triggered? That's a good question too. I am curious to real answers to your question too.