Prius System Readiness Check Incomplete

I'm having an odd issue with my 2010 Toyota Prius hybrid. It's got 117k km on it. The system readiness check is incomplete, and I'm getting an error message on the speedometer. I recently used an OBD2 scanner to check something unrelated, could that be the cause?

4 comment(s)

I had a similar problem with my Prius. Did the check engine light come on after you used the OBD2 scanner?

Yeah, the check engine light is on now. Was it the same for you? Any idea how to fix the system readiness?

Yep, exactly the same. I ended up taking mine to a workshop; they said the computer needed a reset after the OBD2 thing messed it up. Fixed it right up. It's a common thing.

Thanks for the info! I took it to a shop and they reset the computer. The system readiness check is complete now, and the error message is gone. No cost at all!

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