It takes more power to transmit a signal than receive a signal. There is no need for both the car and the key fob to be continuously transmitting. It would make more sense if the key fob just listened and only transmitted when it received a signal from the car.
both key fobs stop working since 1/5/23
Hi guys,
I'm just wondering if anyone had the same issue as me.
I've had the car since dec 2020, and yesterday, around after midday, we were unable to lock the car using the remote key fob.
So I thought the battery went flat on that, so off I went and took the 2nd fob but it was still a no go.
So I thought maybe the battery gone flat on the 2nd one too, so I replaced the battery, checked with my trusty multi meter to ensure that it has the juice, and still a no go.
So the only way for me to enter the car is by using the physical key. Still can drive the car and all that.
But interestingly, once the car is on and while the car is still "awake" even after I turned it off, the remote still works fine.
But after 5 minutes after it went to sleep, the remote stops working again.
and what I realised is that yesterday was the 1st of May, so perhaps the date is set somewhere in the programming? (I don't know, just speculating)
I've called the dealership and the first availability for me is 1st of June, so I'm wondering if anyone had this issue before and if there's a solution that I can try?
Or is the only way is to get it in the garage and get it re-programme? Cheers
I'm just wondering if anyone had the same issue as me.
I've had the car since dec 2020, and yesterday, around after midday, we were unable to lock the car using the remote key fob.
So I thought the battery went flat on that, so off I went and took the 2nd fob but it was still a no go.
So I thought maybe the battery gone flat on the 2nd one too, so I replaced the battery, checked with my trusty multi meter to ensure that it has the juice, and still a no go.
So the only way for me to enter the car is by using the physical key. Still can drive the car and all that.
But interestingly, once the car is on and while the car is still "awake" even after I turned it off, the remote still works fine.
But after 5 minutes after it went to sleep, the remote stops working again.
and what I realised is that yesterday was the 1st of May, so perhaps the date is set somewhere in the programming? (I don't know, just speculating)
I've called the dealership and the first availability for me is 1st of June, so I'm wondering if anyone had this issue before and if there's a solution that I can try?
Or is the only way is to get it in the garage and get it re-programme? Cheers
21 - 26 of 26 Posts
They should go to sleep until moved.It takes more power to transmit a signal than receive a signal. There is no need for both the car and the key fob to be continuously transmitting. It would make more sense if the key fob just listened and only transmitted when it received a signal from the car.
The problem with that approach is it would keep transmitting when in your pocket.They should go to sleep until moved.
The description on this site describes a system I had in mind but I have no idea if Peugeot uses it: What is passive keyless entry (PKE)? | Definition from TechTarget
The introduction in the attached paper is also interesting. The description of the two thief attack also suggests on some system the car continuously transmits .
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An interesting read, but it doesn’t really matter if the key doesn’t sleep whilst in pocket. it would go to sleep when placed indoors and in Faraday pouch.. Interestingly My wife’s 208 key has lasted longer since being kept in the Faraday box. Maybe coincidence?The problem with that approach is it would keep transmitting when in your pocket.
The description on this site describes a system I had in mind but I have no idea if Peugeot uses it: What is passive keyless entry (PKE)? | Definition from TechTarget
The introduction in the attached paper is also interesting. The description of the two thief attack also suggests on some system the car continuously transmits .
I came across a standard button fob which had a fault where it was continuously transmitting a carrier. The fob would lock and and unlock the doors okay but the battery only lasted a about 3 days. Therefore, I think is the fob was transmitting most of the day when in someone's pocket the battery wouldn't last long. It would be interesting to get hold of one and see the signal from it with my Tiny spectrum analyser.An interesting read, but it doesn’t really matter if the key doesn’t sleep whilst in pocket. it would go to sleep when placed indoors and in Faraday pouch.. Interestingly My wife’s 208 key has lasted longer since being kept in the Faraday box. Maybe coincidence?
One thought- If the fob works in the continuously listening mode it may respond to some random signals. Putting it in a Faraday cage would stop that.
In my country, it is a requirement for keyless entry keyfobs to go to sleep if they are not moved for cars newer than 2019 as a safety measure. I assume that Peugeot would use the same key with the movement sensor in other regions aswell.They should go to sleep until moved.
Peugeot uses a different system than other manufacturers which is much less prone to relay attacks. Some manufacturers use the same system for unlocking and starting where Peugeot uses seperate. In this case the most you can do with a relay attack is open the doors but pretty much never start the car.
21 - 26 of 26 Posts
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