GT86 Generator Issue

I'm having issues with my 2012 Toyota GT86 with a gasoline engine (148956 km). I think the generator is faulty: reduced engine power, warning light, hard starts, flickering lights, and an error code. Voltage checks show a drop below nominal charging voltage, and the starter motor is laboring. Could this be a bad generator, or something else?

4 comment(s)

Sounds like a classic alternator issue. Have you checked the battery? A failing battery can cause similar symptoms and strain the charging system.

Could a degraded battery really cause all these symptoms, including the generator error code? Is there a specific diagnostic you'd recommend to rule out the battery?

A faulty battery could contribute, but the error code and voltage drop suggest the alternator is the problem. Given the symptoms and your checks, get it checked by a professional. They can confirm and give you a repair quote.

I took it to a workshop; they confirmed a defective generator and replaced it for 960€. The car now works as expected.

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