Did you find the cause for this?? My light has come on a few times on start (not when running) but after a couple of restarts it has disappeared. So more likely to be an electrical gremlin rather than an actual fault.
Garry
Problem was the rotary switch (also known as clockspring) in the steering column.
Front controler arms replaced, auto trans to be flushed soon and timing belt relaced at 170k? Everything else was putting toys on my 2005 D3 SE. Loving it
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