SantaFe Terminal 30 Error

I own a SantaFe myself, and your issue sounds painfully familiar. The 'Terminal 30 continuous plus interrupted' suggests a power supply problem indeed, leading to a significant voltage drop. If the battery is constantly discharging, it will obviously start poorly. Check the main power cables for corrosion or loose connections; these can cause intermittent faults.

Thanks for the tip! When you had this problem, was it a specific cable or connector that was causing the voltage drop? Or was it more of a general corrosion issue across multiple points?

In my case, it was the main power cable connecting the battery to the starter motor. It had corroded internally, causing a high resistance connection and a significant voltage drop when starting. I recommend you take it to a reputable workshop. A comprehensive electrical fault diagnosis should pinpoint the exact cause before throwing parts at it.

Thank you so much for sharing your experience! It's a massive help knowing that the starter motor cable was the culprit in your case. I took your advice and brought it to a workshop. Turns out you were spot on! The repair came to 290€, including a new cable and labor. Starting like a champ now!