I'd have it checked. My 06 Sonata GL did that once shortly after I got
it back in December. It was a really cold day and I just wrote it off
to the seat cushion material being stiff at 15F or so. The light went
out shortly thereafter and has never acted up since.
It's a known problem in the Elantra. There is no fix for it, but there
may be a re-programming program soon that will allow you to choose
between having the seat calibrated for an adult or for a child. What I
wish they would offer is a way to just bypass the sensor and leave the
damn thing on all the time.
I've been that is a requirement as of the 2005 model year. Is that
correct? My car is an '04. I realize that Hyundai is not likely to
provide a bypass method or mechanism even if it's legal.
There will never be a baby or young child in my passenger's seat, so it
would be nice to be able to have the system on all the time, since the
OCS malfunctions at times when my girlfriend is sitting there.
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