P1339 code in Peugeot 307SW, 2006, 2l, gasoline

Good afternoon.
I see P1339 code in a 307SW Peugeot, 2006, 2L to gasoline. As far as I have been able to investigate, it is combustion failure in cylinder 3 and, in fact, in low tremble a little until 1500rpm approx. We already verify spark plugs and, although they were fine, we clean them, calibrate and change places and the same fault appears. No irregular suction of air is heard. Any suggestion to verify?
Thanks in advance

If you have the coil that is complete as that of 206, 406, 407 and almost all Peugeot Checale usually fails and a cylinder runs out of spark Checar are clear injectors is a bit complicated to get why what has already been mentioned before, but I lean on the coil test and let us know.

Good point, according to "the agency" is not common but I will verify it and notify them how it was solved!

Carlo A wrote: Good point, according to "the agency" is not common but I will verify it and notify them how it was solved!

Testing, we changed the injectors of place and changed the fault to another cylinder, the injector to laboratory was sent and the problem was solved. It probably happened because my wife and daughter frequently use gasoline with sulfur. I asked them to avoid it.
Greetings

Hello Kikemec, it is the firing position of the crankshaft is already failing I had the same problem changed it and a matter arranged