Air Quality Sensor Replacement: Golf 7 Error Persists

Hello everyone,

I have a Golf 7 manufactured in 2015, and when I had the diagnostic codes read, it showed a faulty air quality sensor.
I bought a new one and installed it briefly.
Unfortunately, the error is still there...

You can't find anything about the Golf 7 on Google, but you can find information about other VW models.
There, I read that the problem could also be caused by a faulty fuse, which is why the radiator fan would also run continuously in case of a defect.
I can't test the running functionality right now because it's constantly running. I also checked the fuses, but I didn't find anything that matches the description.

Could this also be related to a fuse issue in a Golf 7, or what else could be the reason why the new sensor isn't working either?

I don't want to go to VW; they'll probably just replace the entire Climatronic control unit.

Thank you in advance for your tips.

Best regards,
Fredy.

Hello,

Please provide a complete scan of the entire sensor assembly. In addition to the sensor itself, the wiring and connector plugs should also be considered.

Best regards, Rainer.

I have uploaded it.

Thank you.

Quote:

Air quality sensor. B10AF 31 [009] - no signal

As I suspected. A "no signal" error can be caused by various issues, ranging from cable problems to a faulty sensor, and so on.

I suggest you get the wiring diagram for your car from Erwin (siehe Fehlerdatenbank) and check how the sensor is connected.

Best regards, Rainer.

Did you install a new VW sensor? Perhaps that one is also defective...

Otherwise, as Rainer mentioned, trace back the circuit diagram and check it.

Another idea:
Do you have the possibility to test the sensors on another vehicle?