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Propulsion Power Reduced - dealer fixed?

14906 Views 22 Replies 14 Participants Last post by  julialetual1
Hi all, just throwing this out there to share my recent scare with the dreaded "Propulsion power is reduced" message on 2017 Bolt. 28000 FLAWLESS miles, then one hot summer day (parked in garage, plugged into L2), I hit the remote start to pre-cool. 5mins later, turn ON to drive away and get the message (and service car symbol). Like I said, it had been PERFECT until then, so I was pretty startled. As I drove through my neighborhood it didn't seem weak, so I thought "maybe it was just a little hot from sitting in the garage, it'll probably go away once it cools off a little". But no, eventually I realized that power really was very much reduced and it wasn't really safe to drive. Parked it, then later that night (cooler temps), powered on and drove around just like normal - but the service car light still illuminated.

I used my OBD code reader and got a few codes, but little/no info anywhere. A few sounded like scary dead battery or main fuse problems. Anyway, the dealer took it in, "reprogrammed" something, and gave it back. It's been totally fine ever since (weeks of driving, all conditions and charge levels). I'll copy the service verbiage below, hopefully this helps someone in the future:

"Corrected by drive motor power inverter module reprogramming with SPS. Found DTC S P0AC4, P0AEE, P0BD2, P0BDC. Inspected and reprogrammed HPCM per TSB 18-NA-064 to correct. SPS code 17YN24133339."

Also wondering if anyone here can get their hands on that TSB, curious what it says...
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I have a 2017 Bolt and yesterday I experienced this "propulsion power reduced" issue. In my case the car would not allow me to place it into drive or reverse.
I've had one occasion in almost 5 years with my 2017 Bolt where the car wouldn't start up properly and I solved it with the "10mm reset" (use a 10mm wrench to disconnect and reconnect the ground terminal of the 12V battery to force a reboot of the car's computers). In a situation like you described it would be one of the first things I'd try in order to get going again.
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