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levimoon5

SMAX incorrect fuel composition error

I'm at my wit's end! My 2021 Ford SMAX Hybrid is throwing an "incorrect fuel composition" error. The check engine light is on, and it stalls at idle. Mileage is 165775 km. Anyone else experienced this nightmare?

4 comment(s)

eberhardneumann1

That's rough! I had something similar with my SMAX. Was the error memory also storing some odd codes? Check your fuel filter, maybe? It messed up my fuel economy badly before I figured it out.

levimoon5 (Author)

Interesting. What exactly do you mean by "odd codes"? And did your car actually stall? My fuel economy is terrible, but the stalling is the real kicker.

eberhardneumann1

Yeah, it did stall a few times. The codes were all related to fuel mixture being off, probably because of the filter. I would suggest taking it to the workshop before you cause any real damage.

levimoon5 (Author)

Thanks! Turns out it was a defective cable/plug connection. Cost me 95€ to fix. Appreciate the help!

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