Spare keyfob not working central locking.

[9fingers]

My rarely used spare keyfob is not working the central locking but will start the engine. I have replaced the battery. Using a radio analyser, i can see there is no 435Mhz transmission from the key.

First Question, if I buy a used key on ebay, is it possible to recode the central locking to accept the new key. Does this need VCDS (which I don't have) or is there a simple process i can use instead.

 

Second question: can I recode the car to accept the transponder in the replacement and does this need VCDS or not

 

Thanks Bob

[ords]

Is the red light flashing on the keyfob?

[ChoonDoode]

I had a bit of trouble when I changed the remote battery several months ago. I just needed the contacts cleaning and pulling out a bit so they gripped tight on the battery a bit more.

 

As said above, check for a red light on the fob. No light = no power. A light and the car doesn't recognise it means you need to reprogram it to the car. There is a section in the owners manual which explains how to do this. No VCDS involved.

 

I wouldn't just go and buy a fob. Be a hassle getting one and then having to get it cut.

[9fingers]

No red light and no radio frequency output. I’ll investigate the battery contacts next. 

[ChoonDoode]

2 hours ago, 9fingers said:

No red light and no radio frequency output. I’ll investigate the battery contacts next. 

 

Yeah, that's the battery. Mine was a bit finicky when replacing.

[9fingers]

OK well here is what i did to make it work.  WARNING:: NOT FOR THE FAINT HEARTED !!

 

Firstly I gently bent the battery contacts to make those tighter. Fitted the battery and still no red light.

YouTube provided this

 

Remove T6 screw and the keyring loop slides and pulls off. Remove the keypad button legend. Then the side of the fob case can be prised off. Following the video carefully the two parts of the case that are glued together can be separated  be prepared to catch the key spring and button. I did split the plastic a little but that part gets covered up on re-assembly.

I gave it a good look round -I'm used to working with electronics. I powered the circuit board up and the red light came on Woo Hoo!

Carefully put it all back together and it is 100% working again. Something must have been dislodged and realigned?? or something else?

Bottom line is I got a result but with a few brown trouser moments and a lot of care and minimal force.

 

The key was no good when I started and I had a 50-50 chance it would be no good when I was done but at least I'd tried but pleasantly surprised with a good outcome.

To anyone following this route all I can say is take great care and only proceed once you have tried everything else first.

Good Luck

Bob

[9fingers]

I've been trying to find the section in the user manual that given the method of re-programming the car to accept another key with no luck

Ive done a wordsearch for "key" and "additional"

No luck with the infotainment Amundsen manual either.

 

Any clues where to find it please

TIA

Bob

 

 

Edited 4 December, 2021 by 9fingers

[ChoonDoode]

In your owners manual, look in the glossary for key.

[9fingers]

48 minutes ago, tunedude said:

In your owners manual, look in the glossary for key.

Thanks but my owners manual has no glossary and the section on keys makes no mention of adding new keys

I must have the budget version of the manual🤣

My enquiry was on based on curiosity especially as other threads here say it can't be done but my spare key is back working now anyway

Bob

[ChoonDoode]

26 minutes ago, 9fingers said:

Thanks but my owners manual has no glossary and the section on keys makes no mention of adding new keys

I must have the budget version of the manual🤣

My enquiry was on based on curiosity especially as other threads here say it can't be done but my spare key is back working now anyway

Bob

 

https://manual-directory.com/manual/2016-skoda-octavia-owners-manual/

 

page 293 and then 64

 

and apologies, I meant index

Edited 5 December, 2021 by tunedude

[9fingers]

Thank you for your time and help tunedude.

The manual you linked me to has an extra 59 pages compared to mine

I wonder what else I can learn about 😄 Only had the 5 years!

[varaderoguy]

On 05/12/2021 at 12:34, 9fingers said:

The manual you linked me to has an extra 59 pages compared to mine

Oh - I know what's happened here.  Skoda released a version of the owners manual - split into two for MY16/17 cars - which had all the Infortainment stuff split into another book - which invariably got lost.

They fixed that for MY18 cars onwards.