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ralf_stern7

Aygo Fault Memory Lock Active

I'm experiencing an issue with my 2013 Toyota Aygo (gasoline engine). It's got only 34837 km on the clock. The diagnostic tool is showing "Fault memory lock active." The sole symptom appears to be an error stored in the error memory. Has anyone encountered something similar? Could this be a software glitch, or am I facing a more profound electronic gremlin?

Summary of the thread

A 2013 Toyota Aygo is experiencing a "Fault memory lock active" error, with no other symptoms. This issue may be caused by undervoltage from a weak battery, which can confuse the car's computer system. It is recommended to have a professional diagnose the problem, as they have the necessary tools to address potential battery or electronic issues. The problem was resolved by addressing the undervoltage at a repair shop.

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4 comment(s)

martha_lehmann3

Hey! Yeah, I kinda know what you mean. Is the car battery okay? Had similar weird error messages on my old car, and it turned out to be a weak battery causing undervoltage issues. The car's computer gets all sorts of confused when the voltage drops!

ralf_stern7 (community.author)

That's interesting! How would I know if that is the root cause of the issue? Can I somehow check it myself?

martha_lehmann3

Well, a multimeter would tell you if the battery's putting out the right voltage, but honestly, if you're seeing memory lock errors and you suspect undervoltage, you're probably best off having a shop take a look. They've got the proper tools to diagnose the whole system. It might be more complicated than just a battery issue.

ralf_stern7 (community.author)

On my Aygo! You were absolutely right. Took it to the shop, and it was indeed undervoltage causing the memory lock issue. They sorted it all out for 240€. Thanks a bunch for pointing me in the right direction!

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TOYOTA

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AYGO