307 Antipollition Fault HELP

Hello, I just joined your friends.
1 month ago I bought a 2003 model Peugeot 307 xt premium 1.6 lpg car. It was 73000 km when I bought my car. I have been traveling for about a month without stopping, but it turned out that the Ignition Coil was cracked before the feast, I ordered a new one and changed it on the eve.
It was nice at first. It has not been more than 50 km that the ANTİPOLLİTİON FAULT letter and the Motor Malfunction Light turned on. Of course, I went, I came last night, there is no problem in the vehicle work, but it shakes the first start and take off.
I traveled 1500 km in this way. I have done 2000 km before.

now this is the reason why this malfunction is caused by not changing the Ignition Coil or it is another malfunction.
I know this fault letter is the Oxygen sensor. . I would be glad if you can help me.

I have not discarded the old piece, it stands, I try to change it, but I would be afraid if it would be a solution or would I cause something else. ESKİŞEHİR

As a result of the change, it was understood that the vehicle's ignition system was incompatible with LPG.

Thanks, I will have my gas set up and try as soon as possible.

I think there is no need for oxygen sensor replacement even if the error persists. There are many 307 antipollution fault errors that you will see.

It should also be noted that antipollution fault is a general error. It is important to see the error codes on the computer.