Previa Fault Memory Lock Active Error

Wow, that sounds familiar! I had something similar happen with my Previa. It might be worth checking the battery connections and the grounding points. Sometimes a loose connection can cause voltage drops that trigger these kinds of errors in the computer system. Basically, the ECU (Engine Control Unit), which is the car's computer, might be acting up because it's not getting the right voltage. Any other weird electrical issues?

Thank you for your input. Could you please elaborate on which grounding points are most susceptible to this issue? I would like to inspect them thoroughly before proceeding further.

Sure thing. On my Previa, the ones near the engine block and the ECU itself seemed to be the culprits. Look for any corrosion or loose connections. Also, the one connecting the chassis to the negative terminal of the battery. Honestly though, if you are seeing undervoltage errors, this could be tricky to diagnose yourself. It may be best to visit a workshop with diagnostic tools. That way you can ensure whether it's not a deeper problem with the car electronics.

I appreciate the advice. I will inspect the grounding points you mentioned. Given the complexity, I will schedule an appointment with a qualified workshop for a thorough diagnostic assessment. The repair cost was 240€.