Headlight leveling fault

[Nazariy123]

2015 Audi S4. I recently got the auto headlight leveling fault on my dash. I know my car has one sensor on each wheel. I took the arm off every one and moved the sensor up and down resulting in the headlights moving up and down.
When I got to the rear passenger side sensor, the headlights did not move when I moved the arm.
This makes me believe that this sensor is what I need to buy.
But when I unplugged the sensor I got a new code on the dash saying suspension sensor failure. This code only came up when I unplugged the sensor on the suspension.
I scanned the car and all it told me regarding the headlight is that it couldn’t communicate with the module.
Do I need a new sensor? Do I need to go to the dealer and have them clear the codes? Is that sensor on the rear passenger side working? Since it gave the code after I unpluggged it

[maximbrk]

might be a long shot, but what are you using to read the codes? I recently lowered my car and I got the headlight level fault coming back after trying to adjust them, but I was using OBD11 with an iPhone for the coding. apparently it's a known issue that iPhones are a little buggy with OBD11 and as soon as I got my friend's Android to do it, it worked perfectly and cleared the code.

[Nazariy123]

I don’t know the name but my friend has a computer that plugs in through the OBD. It’s a good one haha

[Smac770]

For scan tools, for Audi, you either have a Ross-Tech cable and using VCDS (which runs on Windows), or you have something not as good for the task. OBDeleven tries, but it's only better for modders, not troubleshooting. But it's competent enough to pull codes. You don't post any of the technical data one would use to make a conclusion, so we have no information to make a conclusion. You could have a wire break just as much as a broken sensor. It appears all four use the same pinout (pins 1,2, and 3 of the 4), so you could try and take one of the others and plug it into that right rear connector and see if the headlights now move.