Someone posted about some recall for european cars. I can't find it on the first 2 pages during a search so maybe someone with more patience will post it. I've never dealt with a car with autostart/stop but you're gonna have to start by finding out what codes are stored. Likely an abs code, or maybe the brake switch is hooped? Supposedly they make lights come on for no reason.
Edit:
I see you tried scanning already. Cheapo junk obd readers are usually pretty useless for anything other than an engine light, so you'll either have to buy a decent scanner or just take it to a competent shop that already has one.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)