Seat Arosa Fault Memory Lock Active Issue

My 2004 Seat Arosa with a gasoline engine is throwing some weird errors. VCDS is showing 'fault memory lock active'. I'm guessing it's something to do with undervoltage, but I'm not 100% sure. Anyone else run into this? It's storing an error in the error memory, which I think is the ECU.

4 comment(s)

I had a similar issue with my Arosa. The fault codes kept popping up, and the control unit seemed to be acting strange. Is it struggling to start?

Struggling to start? Not really. It just feels like something's not quite right, and the error light is annoying. You had the exact same 'fault memory lock active' thing?

Yep, that was it exactly. 'Fault memory lock active'. It's like the car's ECU is locking itself down because it thinks something's wrong due to low voltage. I'd suggest getting the battery checked and the fault codes cleared at a workshop. Could save you a headache.

Big thanks for the confirmation. Took it to the shop and they found undervoltage like you said. New battery and a reset of the fault codes later, and it's running like a charm. 240€ lighter, but worth it to have it sorted.

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