How many of you modify the computers on your cars or remove sensors that communicate to the computer system?
I do, well, sort of. I have software for communicating with the ECU in my Volkswagen TDI.
This software isn't a hack though...I bought it from a reputable USA company.
I do have access to some ECU control parameters...ignition timing, EGR valve control, some fueling, etc.
For me, it's more of a troubleshooting tool and for fine tuning.
After changing the timing belt in these cars, the timing must be set correctly...and you do need to somehow "speak" to the ECU in order to do so.
I also had the software for flashing the ECU in my C14, and I did so, many times.
I can't imagine any of the car manufacturers really worrying much about us changing our own oil and filters, or pads and rotors...but...I can certainly understand their concern over the average Joe with a credit card buying software that allows them to hack their own ECU's.
And this isn't new stuff...this has been going on for years.
The original OBDII system was for emissions controls...but it covers much more than that now. People disconnecting emissions system controls is one thing...while illegal in some states...it is not illegal in some others. Emissions issues are not safety issues...but they are moral issues.
Scenarios of concern that I can see are:
An end user that modifies his car's ECU, but then also flashes the stock programming back in before bringing the car into the dealer for a warranty claim. This happens.
An end user that gets sick of looking at an ABS malfunction light on the dash...and then goes into the ECU to disable the sensor, or module, etc in order to save the $600 required to repair the problem correctly. This happens.
Etc, etc, etc...