I usually press the lock button on the door as I exit and close the door on my C8. This will automatically lock the car and arm the alarm when I have gotten a certain distance from the car. This is either default or something I configured in the settings. Well, I discovered another weird feature by accident. If you press the lock button twice when exiting and closing the door, when you get a certain distance from the car the engine will turn on. The question is why do we need this feature on the car?

 

But is it a feature tho? Could be a bug lol

 

I found this in the OM. It looks like there is indeed a programmed feature for when you press the lock button a second time like you did, but the result shouldn't be what you got. Unless I'm misinterpreting something, this may indeed be a bug.

 

Does sound like something that should not be happening.

 

 

that's really strange, I don't believe that is the intended function?? But I gotta ask....If you have the settings for the car to Lock automatically as you walk away from the car, then there is no need to touch your remote at all.....Not sure why everyone wouldn't want this feature turned on....

 

What if I want to grab something out of the car (or put something into the car) while it's in the garage but the remote is in the house? Now the car is locked and I have to go into the house to get the remote.

 

Yes, as an extra form of security I set the auto lock to help prevent theft. For example; someone lurking nearby waiting for you to use the keyfob with a copy device. Since I don't use the keyfob for entry or exit, that problem is solved. Maybe somewhere in those settings I accidentally chose an option to start the car after a timed interval. Maybe the name of the feature should be "Show off"

 

I figure my car is safe in my closed and locked garage. After I open the driver’s door to exit the car, I press and hold the unlock button until I hear a chime. That overrides/bypasses the auto lock until the next time I start the car. That way I can get into the Corvette whenever I need to without having the key fob.

 

That doesn't happen on my 2021. I don't think that's the intended behavior

Auto lock works by sensing the fob going out of range. Not sure if it actually exchanges codes with the fob or not. If you lock the car with the inside lock button as you get out, the fob isn't used at all. And if the car is locked, the fob and car communicate whether you press a button on the fob or use the pad under the door handle. The only way the car knows it's OK to unlock the door is by querying the fob. So you DO use the fob for entry, whether you realize it or not.

I can't imagine why there would be an option to start the car as you walk away.

 

This may be true but a thief would be looking for you to be grabbing the keyfob or holding it out which is eliminated in this procedure.

 

I have a 2021 C8 and if we're out someplace or I am I noticed ,and tried to confirm this, that when I leave my car in a parking lot it automatically locks. But when I put it in my garage I can come out the next day and open the doors to get my sunglasses out without having the FOB. How come that happens? So after I thought about it I don't trust the auto locking anymore so when I'm out anywhere I still use the FOB to lock it and blow the horn. Am I paranoid? Maybe! But as an engineer myself I still never completely trust the so called "foolproof" features.

 

I'm trying to reproduce the problem and so far I coming up blank. I was out with my GF and family when it happened so I have several witnesses.

 

You can long press the unlock button on the door after it's open and after it 'chimes' the auto lock will be disabled. This is how the c7 was and how I use the c8.

 

Are you sure you didn't double tap the button under the lock, which is in fact the auto start? That's the only thing that should start your car. Otherwise you have a significant issue.

 

The only button that was pressed was the lock button on the door. I pressed it twice. Keyfob was not in use.

 

Ah, gotcha. Misunderstood that. Definitely strange!

 

I think a thief would simply have his sniffer turned on and waiting for a signal. If he's trying to steal a modern car, he's going to know most of them don't need you to push a button the remote to unlock.

 

I ... nope, I have no response.

 

I see no reason for the door lock button to transmit wireless RF to the locking mechanism if it's a hardwired electrical signal. A wireless signal is only necessary for portability like key fobs are to trigger remotely, not doors that are never remote from the locks within them. Otherwise, key fobs wouldn't be the target if the door button is the constantly exposed vulnerability and the market for Faraday pouches wouldn't exist.

The fob is the literal key secured signal that controls the car. But there's no need for the car to be a key that controls the fob. Instead the car would broadcast an unsecure polling or ack signal for the key to pick up. Or if both directions are encoded, they don't need the same coding scheme both ways. Could be half-duplex meaning one code set only works one way (fob-to-car) and a different code set only works the other way (car-to-fob). Or fob-to-car is on a different frequency (call it freq A) and car-to-fob is on freq B. Sniffing the car-to-fob code set on freq B then sending it back to the car would fall on deaf ears because the car is only listening for commands on freq A (fob-to-car). The car has no ears on freq B because freq B is only for sending, not receiving. Plus the car's broadcast of car-to-fob on freq B is bouncing back to itself through RF reflection from environmental obstacles like buildings, etc. So a thief is just sending another copy of a signal that the car is already shouting back unto itself multiple times through reflective RF multipath--multiple copies of the car's freq B signal being reflected by multiple environmental surfaces at various time delays because they're spaced various distances apart. It's like many echoes of what the car is shouting come bouncing back to the car at different time offsets from each other. So a thief's copy would just be another useless echo among many already bouncing back to the car at a frequency it's not listening on.