So on Sunday the radio would turn off and on and then turn back on by itself. then the TPMS sign kept flashing, so I checked my tires and made sure they were filled with air. then today my car wouldn’t turn on, then it did and was driving fine, but when I was driving home, same issue with the radio, and then it started working fine. When I got home again, the car would turn off for a couple of seconds, and then it turned on. Does anyone know what it could be?
How long has your 2017 Subaru Impreza had this problem?
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Hi, this is Bo, an auto expert on RepairPal's Car Genius team!
Your 2017 Subaru Impreza’s electrical hiccups—radio acting possessed, TPMS flashing, and the car refusing to start intermittently—sound like a classic case of a failing battery, weak alternator, or a grounding issue. When your electrical system isn’t getting consistent power, it throws a tantrum across multiple systems, which could explain all these odd behaviors.
Start by testing the battery and alternator to ensure both are charging and holding power properly. Modern cars are sensitive to voltage fluctuations, so even a slightly underperforming battery can cause chaos. Also, check your battery terminals for corrosion or loose connections, as those can create similar gremlins.
If your battery and alternator check out, a failing body control module (BCM) or a bad ground connection somewhere in the vehicle’s wiring might be causing intermittent power drops.
It’s worth getting a full electrical diagnostic to pinpoint the issue. Catching it early could save you from a tow later.
If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.
