williamtiger9
Grandeur electrical malfunctions
Summary of the thread
A 2004 Hyundai Grandeur is experiencing widespread electrical malfunctions, with the error memory displaying numerous issues and the navigation system failing. The problem is suspected to be a software glitch in the control unit, potentially due to implausible programming. A recalibration of the control unit, quoted at 240€, is suggested as a solution to resolve these issues.
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4 comment(s)
williamtiger9 (community.author)
Good shout! Hmm, it DOES seem worse after a cold start, now that you mention it. But it also went bonkers after I was messing with the climate control the other day. It's like the car's brain farting at random! Was yours doing the exact same thing?
benjamin_kaiser83
Yep, cold starts seemed to make it worse for me, too. Honestly, chasing the rabbit down the hole of 'what triggered it' got me nowhere. Just get it to a shop and they can fix it with a recalibration, it is not worth tinkering with your control module alone. Save yourself the headache and avoid bricking your ECU. Speaking from experience!
williamtiger9 (community.author)
Awesome, thanks a bunch! Recalibration, it is. Dropping it off at the workshop next week. Hopefully, that'll sort out the electronic gremlins once and for all! Appreciate the advice – you saved me from tearing my hair out completely!
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HYUNDAI
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GRANDEUR
benjamin_kaiser83
Whoa, sounds familiar! I've got a Grandeur too, and I had similar issues a while back. Error codes galore, and the electrical gremlins were out in full force. Was it completely random, or did something specific seem to trigger it? Like, did it happen after a cold start or after using a particular function?