An ice chunk ripped off the wire to a wheel sensor in December.
This caused massive alarms,
-parking brake, ABS, DCS, tirepressure, speedcontrol, transmission, self-driving, comfort rear-radar, etc.
Volvo(Sweden) repaired it and cleared the alarms.
But the alarms return now and again, and it's almost March.
The car is fine, the alarms disappear after a minute or so.
The alarms are not seen with an OBD scanner.
Anyone else seen this?
thanks,
John

The car runs fine but the alarms have returned.

 

Get the car scanned with a scanner that can communicate with the modules. Not all codes throw a CEL. Either use VIDA or a quality scanning tool. You can always bring it back to the dealer and say the problem they fixed has returned.

 

Dingus
Thanks for the tips.
Volvo tried to clear the alarms but couldn't see them either.
Some days when I start the car, they appear, some days not.
Some times I have to ack an alarm, some times they disappear after a minute or so by themselves.
But, the car works just fine.

 

If you are still having the issue, this is caused by a faulty ABS sensor. It's an easy and cheap fix though.