Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Busted! SCAMMING Mechanic Causes Damage! 4l60E Transmission" video.

This story makes me wonder if every car owner should own his or her own scan tool able to scan coding and fault codes of all the modules in the car. And whenever the car is serviced anywhere, the owner verifies the changes made by himself or herself to make sure the car is at least in similar condition as before the service. It's definitely not okay to get any new faults whenever a car is serviced by a competent mechanic. But if you cannot be for sure that the mechanic is competent, you have to do the QA by yourself instead of trusting the mechanic. It's important to understand that not all faults light up the warning light in the instrument cluster but every fault is still worth knowing and following any changes related to it if it doesn't make monetary sense to fix.
1