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Q: check engine light on on 1991 Subaru Legacy

check engine light came on did self diagnosis, whould not show a code till I started it. 3 quick blinks repeated with pauses, stut off engine, disconnected green self diagnosis connecter. Drove it no light, drive it again a bit later light was back on. What is it?
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There is no code 3 or 30 for your Subaru, read the code retrieval procedures from Subaru, below is a link. Then you can deal with the problem much more effectively.

Here is a link for repair info for your car

http://bit.ly/mitchell_repair_manuals_online
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