On a 2021 Kia Seltos today, the OEM portal dropped the BCM/immobilizer session at 62% after a swap; I recovered by pre-coding the smart key and re-syncing via J2534 pass-thru, but I’m curious what you trust when the online path flakes. Are you seeing better consistency sticking with GDS over an IM608 Pro in pass-thru, or is there a more robust workflow for these?
I’ve had better luck with KDS/GDS via a Mongoose‑Plus HK and a locked 13.8V 40A supply — ‘62%’ is usually the SBL load choking on a tiny voltage sag; run Ethernet and kill Wi‑Fi. This dongle’s been rock solid for me: https://www.drewtech.com/products/mongooseplus/hk.html — have you tried that combo?
I’ve found that using an external power supply can help keep things stable during risky operations like this. It’s like giving your car a little extra caffeine to get through the tough spots. Have you tried running with a dedicated power supply or maybe even grounding your setup better? @lindsey_b87, what do you think?