[cellsafemode]

if it ever gets implemented it'll be about controlling who can work on the car and not about emissions at all. This is simply a fallback option for a justification on abusing right to repair laws if and when they get passed in various states. They'll use their version of "think of the children", which is "think of the environment" to enforce only "authorized" technicians can make repairs and install equipment and adjust parameters so long as it can be tangentially related to emissions (which is mostly everything - even the tire pressure).

Dont mistake that that is the primary purpose of such a feature if it's being considered. It serves no other purpose, it's the state's responsibility to test cars for emissions if they want to, not the manufacturers to do it for them. It's stupid for the government to trust the testing of emissions to be done by the thing they're testing anyway. But that's a different topic.

[Number 3]

Originally Posted by ctrlz

Not exactly how the VW cheat worked. A bit more clever than that.
During emissions standards tests, cars are placed on a chassis equipped with a dynamometer, which measures the power output of the engine. The vehicle follows a precisely defined speed profile that tries to mimic real driving on an urban route with frequent stops. The conditions of the test are both standardized and public. This essentially makes it possible for manufacturers to intentionally alter the behavior of their vehicles during the test cycle. The code found in Volkswagen vehicles checks for a number of conditions associated with a driving test, such as distance, speed and even the position of the wheel. If the conditions are met, the code directs the onboard computer to activate emissions curbing mechanism when those conditions were met.

You are correct. Thanks

[Chris C 1SS 1LE]

Liberty lost is seldom restored...

[CoolbreezeNJ]

I don't doubt it. I own a '17 Silverado Diesel and it was hell for the tuners to get the ECM cracked and not sure they ever really did it. When it first came out it was essentially $4K to tune your truck which included you buying a new ECM.

In the forums there was a Cyber Wizard who claimed people would never get it cracked but I'm not sure GM implemented all the protections he thought they would do. Long and short of it they can essentially lock anybody out of it forever if they really wanted to. Really all they have to do is get the vehicle to do constant checks module against module and if the codes don't match then the modules shut down. A clearing house can be setup to update the modules say via Onstar. The only limits is how this effects servicing and if it is too much of a pain or too costly to say dealers then they might not go that far.

[Blueclyde]

The ability to check if a vehicles calibration has been altered from the original factory calibration already exists today. California ARB is already monitoring this data from their existing required annual inspection and maintenance tests. I was at an OBD symposium in 2017 and listened to CARB staff present findings on actual California vehicle I & M data where vehicle calibration ID and/ or CVN was different than what the manufacturer had reported in the vehicles emission application documents. Not surprising, the vehicles topping this list were Subaru WRX, Mustang, Camaro, Corvette, etc. The regulatory agencies are already aware of the aftermarket industry. It’s a resource issue for them. They will start cracking down on these tuner shops installing unapproved modification, which is technically a violation of the Clean Air Act. There will be a reckoning in this industry at some point, and it will drive companies out of business.