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christopher_star1
Sienna Hybrid incorrect fuel composition error
4 comment(s)
christopher_star1 (Author)
No knocking. The fuel economy does seem a bit off. What kind of "component" are you referring to? Is it something I can check myself?
marcomaier3
The component related to fuel composition is part of the fuel system. Given the error code and the stalling, a loose connection or a damaged wire in the fuel system's sensor circuit is probable. I recommend professional diagnosis and repair at a qualified workshop to prevent further damage.
christopher_star1 (Author)
Thanks! My mechanic found a faulty connection, just like you said. Cost me 95€ to get it sorted. Glad it wasn't anything major!
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marcomaier3
I had a similar experience with my Sienna. "Incorrect fuel composition" can be triggered by a defective cable or plug connection. Have you noticed any changes in your fuel economy recently? Also, does the engine knock?