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Message: <blockquote data-quote="adspguy" data-source="post: 6197540" data-attributes="member: 55192">I posted this in another thread about battery heater woes…. I wonder if there is some software glitch around supercharging that is triggering fals battery heater problems. Could you tell if the battery heater you replaced was actually broken? So my 2016 model S gave the error code Bms_w035 code just as I arrived and parked at a supercharger. Since I was navigating to the supercharger, it said it was preconditionping for faster charging. the car did supercharge at 100+kw so the battery was warm. the First message triggered a service required message. When I started the car after supercharging, it threw the additional codes bms_w172 and bms_u008. The dreaded ”limp mode” and “car may not restart” mesages. I scheduled service the next day and got an appointment for 3 weeks later. I Drove the car in limp mode a few times and did a power down restart but limp mode and may not restart remained. It looked like they did a remote diagnosis when they scheduled the appointment and they predicted the expected battery heater needs replacing and quoted $658 to fix it since I am out of warranty. I dropped the car off and got a model 3 performance loaner. It took them another week to actually look at the car. When they cleared the limp/may not restart codes it no longer reported any trouble. They ran diagnostics and found nothing. They called and asked permission to do additional debug for a 1 hour service fee. I reluctantly said ok, and they did additional testing and thermal cycling. They couldn’t find any problem. In the end quite a big hassle for what seemed in my case to be a software glitch. In the end I wished I had gotten them to clear the limp code remotely and just seen if the code for the battery heater would reappear. YMMV.</blockquote>

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