Saab 9-5 2.3T 2006 194kW - Parking Sensors Not Working, B2950 Fault Code, Replacement & Silence

Hello, Saab 9-5 2.3T 194kW 2006. After pressing backwards, the error "parktronic assist failure" and the fault code B2950 appeared. I replaced all 4 sensors and now there are no fault codes but there is silence after pressing the reverse button. The parameters show that the sensors measure the distance. I have installed 2 functional parktronic module and there is also silence. I know that on the Saab 9-3 the sound comes from the loudspeaker from the left-hand pit. I have silence after turning on the radio, the music is playing. What can be ?

I noticed that in the 9-3 model, the sound of the sensors can be heard from the left and right side of the loudspeaker in the pit, just as I turn on the indicator (you can hear the sound of the interrupter). In my case at 9-5 you can not hear anything but the music from the radio. What element is responsible for setting the tone in the speakers of the appropriate sounds?

Hello, I'm sorry that I am writing here, but I can not find anything, I have such a problem with my Saab 1.9tid 2006, I changed gearboxes before replacing the engine was running correctly. After firing, the car ran normally for a few minutes, it reacted to the gas and no errors, it suddenly went to 1400 rpm and the esp zero reaction to the gas fired. After connecting the computer to the engine, zero errors and in the abs, error c 1926 acceleration position sensor. I checked all connections of the throttle plug egr gas potentiometer and nothing. I have no idea what could be. The only fault I found was a damaged water sensor in the fuel filter, but I don't know if this could be the cause

Maybe some weight for the box / body not twisted?

I screwed the mass, but thanks for the suggestion, I will check it tomorrow, it may have loosened