Fiat Seicento 900 - Orange Key CODE Indicator Light Issues: Causes & Solutions for Engine Start

Hello, for a few days during the ride the above mentioned lamp was lit, after turning off the engine everything ok, one time he did not want to start the car, it helped to disconnect aku, but today the lime does not help what can be the cause, replacing the key the same.

Probably some security signaling an error, the immobilizer system? For me, it's usually enough to check and clean the system's connections, a functional ignition ... And at your place? Have you already looked for an answer?
http://poszukaj.elektroda.pl/szukaj,seicento-świeci-code.html

This indicator indicates a fault in the Fiat immobilizer system. If it ignited briefly while driving, it is possible that the charging of the battery dropped below a certain value and the controller signaled it by checking the voltage. If you have a code card for this car, launch by entering the electronic code from the card using the accelerator pedal procedure - to find, for example, the pdf manual in the network.
If you do not want to have problems with this emergency immo find an unpaved engine driver but before that unpin the immo control unit behind the fuse box in the cabin. Then you can fire without a problem if the fault is on the side of the immobilizer

Thanks, and maybe there is someone from the boat what it does and erases the IMMO code from the controller I have an IAW 16FM.EC 0.9 SPI central unit, they are supposedly doing IMMO decoding without desoldering the prock.