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1987 Eldorado W=621 code

1015 Views 0 Replies 1 Participant Last post by  tibi500cid
My good friend has a 1987 Eldorado. Sometimes while starting the engine a code appears for about 1 second on the dash near the speed digits (red arrow on the attached photo).
The code is W=621 .
Anyone any clue what this means?

Thanks in advance for any info on this!


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