If anyone could help me with this I would be very grateful.

I was trying to code a new key to my '06 FABIA estate TDi using VRU STU's excellent instructions ( these worked fine on my other car SDi ).

I have managed to login and clear all the keys but can't get the keys to re-scan.

When I checked for error code I get the following :-

Address 01 Powertrain

18097 - Powertrain Data bus implausible message

P1689 - 35-00 - -

17978 Engine start blocked by immobiliser

P1570 -35 - 10 - - - Intermitent

Address 09

01598 - Drive Battery Voltage

07-00 signal to Low

Address 17 Instruments

01176 -

Key

65 - 10 Unauthorised - intermittent

01179 Incorrect Key Programming

35 - 00 - -

[This is abridged all other units work]

[apologies for any mistakes but re-keying rather than pasting]

Is it something as simple as the battery voltage is too low ?

Or is the antenna for the key not working correctly ?

Thanks in advance

I'd try charging the battery first and see if it works then.

Does the battery one clear off? You normally see that if the battery has been disconnected.

With ignition on, first of all go into 17and clear any fault codes, then log in (11) with your code and remember to prefix it with 0, adaptation (10) and channel 21, enter in 2 keys, test, save, OK and get back to the modules listing screen and put the other key in the ignition and turn it on - then hopefully both keys will be programmed.

OK, I have recharged the battery, it reads 12.4 V on the central load controller.

Tried clearing the fault codes on all the units but the best I can do is either 1 or 2 keys working but still with the immobiliser light on i.e. engine starts and runs but imobiliser light still flashes.

I seem to be stuck with the fault code on the instument cluster.

When you are trying to pair your keys the imobiliser symbol just flashes.

I am aiming for 3 keys is this not feasible

It drives at the moment so perhaps Iwill have to take it to the dealears.

IIRC you can program up to 5 sets of keys,

Something has got to be wrong with the way your coding them.

Or that the key isn't suitable for the car - is it from eBay?

OK,

After reading through the advice more carefully. I found out my finger trouble . I was taking the first key out and putting it back in. At which point the instrument cluster records that as 1st and 2nd keys, the next key gets accepted but of course you now throw an error code.

THANKS GUYS.

Good result then.

IIRC you can program up to 5 sets of keys,

Just for future reference, usually the maximum number of keys (immobilizer) either 4 or 8 - 8 is most common for every more or less current model. In terms of remotes (central locking) the magic number is 4 while auxiliary heating remotes it's usually 3 or 4 depending on the individual system.