[DomP]

Hello! I usually post in the E84 group, but this code should be the same among all BMW E chassis vehicles. I scanned codes today and found C920 code. Any idea what this could be? Thanks!
I’m assuming the A670 one is a faulty RLS calibration from when my windshield was replaced

[kkasson]

I believe that's telling you that it didn't receive the wheel speed as expected from a wheel speed sensor.

I'd just clear it and see if it comes back, it's most likely just a glitch if you're not having any other problems. Has the ABS or DSC light been on recently?

A670 is the condensation sensor underneath the RLS. It's used in Auto climate mode to tell it when to turn on the defroster if your windshield is getting fogged up.

[DomP]

Originally Posted by kkasson

I believe that's telling you that it didn't receive the wheel speed as expected from a wheel speed sensor.

I'd just clear it and see if it comes back, it's most likely just a glitch if you're not having any other problems. Has the ABS or DSC light been on recently?

A670 is the condensation sensor underneath the RLS. It's used in Auto climate mode to tell it when to turn on the defroster if your windshield is getting fogged up.

I’m thinking one of my sensors is malfunctioning, sometimes in corner acceleration the flashing abs light turns on like I’m losing traction, even when I’m not. My car has rain sensing wipers, so I think it just has the RLS module. I took off the outer cowl and only saw the RLS. Turns out the humidity sensor is missing, and I think it has been since I bought the car from a windshield replacement.