michaelbecker1

Grandeur Error Codes U0100 P0606

I'm pulling my hair out! I've got a 2022 Hyundai Grandeur Hybrid, and I'm getting fault codes popping up like crazy. The error memory keeps storing them, and both my infotainment system and my speedometer are flashing error messages at me. I've tried resetting the codes with my OBD-II scanner, but they just keep coming back. I suspect it might be a coding issue, but I'm not sure where to start. Anyone else run into this with their Hyundais?

A 2022 Hyundai Grandeur Hybrid is experiencing persistent error codes U0100 and P0606, indicating communication and processor faults with the vehicle's control modules. Despite attempts to reset the codes using an OBD-II scanner, the issues persist, suggesting a potential coding problem. A similar issue was resolved by having the vehicle recoded at a workshop, which is recommended as the solution.

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4 comment(s)

I had something similar with my Grandeur. Which code are you seeing?

It's showing U0100 and P0606. The scanner calls them something like 'Lost Communication with ECM/PCM' and 'PCM Processor Fault', respectively. What was your code?

Yep, those are the same codes I saw too. Turned out the coding was indeed incorrect. Bit over my head to fix myself, so I took it to the workshop, they recoded it, and it's been fine since.

Thanks for the heads-up! I was hoping to avoid the workshop, but it sounds like that's the way to go. The estimate I received for the recoding work is around 360€. I'll book it in and hopefully that'll sort it. Appreciate the help!

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HYUNDAI

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GRANDEUR