matteo_himmel1
Previa System Readiness Error
Summary of the thread
A 2005 Toyota Previa diesel owner encountered a 'System readiness check incomplete' error after running an OBD2 diagnostic. This issue likely arose because the onboard diagnostics readiness monitors hadn't completed their tests, possibly due to recent code clearing. A suggested solution was to perform a drive cycle, which involves specific driving patterns to allow the car's computer to complete its checks. Ultimately, the problem was resolved at a workshop where the system readiness was reset using professional diagnostic tools, at no cost.
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4 comment(s)
matteo_himmel1 (community.author)
A drive cycle? What does that involve?
gabrielkoch8
Yeah, a drive cycle. It's basically a specific driving pattern that allows the car's computer to run all the necessary tests. However, the drive cycle can be quite involved, with specific speeds and durations. Some say you need to bring it to the workshop to have them run it, since you need the exact conditions and a professional diagnostic tool. I did not want to take the risk and simply went to the dealership.
matteo_himmel1 (community.author)
Thanks! Turns out you were right. The guys at the workshop simply reset the system readiness via their computer - cost me nothing!
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TOYOTA
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PREVIA
gabrielkoch8
I drive a Toyota Previa myself (though not sure what year) and had a similar issue after clearing codes with an OBD2 scanner. It seems like the onboard diagnostics (OBD) readiness monitors haven't completed their tests yet. Basically, the car's computer needs to run through a series of checks to ensure all systems are working correctly after the codes were cleared. You may have to perform a drive cycle.