I just found the article may be helpful to some:
I've been replying to threads about this, but figured it would be more productive to get this up top and more exposure. Also, while my other replies were more emotional/opinionated, this one will be "just the facts."
What is the TCAM?
Stands for Telematics and Connectivity Antenna Module, and it's in the "shark fin" on the roof of your car. It basically controls all aspects of digital connectivity - LTE, GPS, Wifi, Bluetooth, even your keys. TCAM issues can run the gamut from minor (temporary LTE outage) to severe (can't get into your car or start it). While the severe issue only impacts a SMALL number of users, it's not the sort of issue you want on a road trip.
What vehicles are impacted?
2021-2022 model years of the below vehicles:
- Polestar 2
- Volvo XC40
- Volvo XC60
- Volvo XC90
What's causing the TCAM issue?
There are numerous causes of TCAM issues, many of which are software related and can be solved with a reboot or by disconnecting/reconnecting the battery. And these kinds of issues have been around for years in a majority of cars. The purpose of this thread is to focus on a known defect - moisture intrusion due to a degraded or poorly completed seal. You don't need to open anything or have any mechanical expertise. A visual inspection of the base of the roof's "shark fin" will suffice.
Here's an example from an XC40 (click me!) |
One more example
The moisture can cause short and long term outages. Those in rainy climates (hello Portland/Seattle/Vancouver owners!) are more likely to be impacted.
This has been redesigned for the C40 to avoid this issue entirely,
AS SEEN HERE (CLICK ME).
What's the fix?
Depends on the brand. Volvo and Polestar are currently handling this in different ways.
Volvo has released a technical service bulletin (TSB) to address it.
Active Service Campaign : A10140 Antenna Cover : Model Year 2021 and 2022 90 Series, XC60 and XC40 Item:A10140-2021-12-09
The fix is to inspect the TCAM, replace if any signs of moisture, and reseal the "shark fin" so that this doesn't happen again. Ideally. As you can see from the TSB, this is recent. Volvo released this to the field on December 9, 2021.
Polestar hasn't yet caught up to Volvo's TSB, so they're still fumbling in the dark. A wide range of advice is given from different resets to bringing it in for a firmware reflash to a full on TSB replacement. The service department gets reimbursed from Polestar/Volvo when they follow directions, so Polestar's techs in the field need this TSB before they can reliably and consistently fix this issue.
What can I do?
If you are not yet having this issue and want to avoid it, pay attention to the shark fin when washing your car. Don't hit it point blank with a pressure washer. You don't want to damage the seal. It's not super fragile, but it's not going to hold up to a short range blast either.
Inspect the seal periodically and, if it degrades, take it in to be resealed. If you don't moisture WILL get in, and you WILL eventually have an issue.
If you're accepting delivery of your car, inspect this seal. If a leak is present, refuse the car unless they agree in writing to fix it. One user noted that this part is NOT part of Volvo's dealer pre-delivery checklist, so you're more likely to catch it than they are.
And most importantly, complain (politely and professionally) -
Contact us for personal support | Polestar US
If you're impacted by this issue, let them know how you feel. If you're looking to buy but this is a concern, let them know. Personally, it's the last issue preventing me from buying. And I'm messaging them once per week (until I give up or move on to another vehicle) to get them to acknowledge the issue via TSB to get us a more permanent fix.