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Re: 1991 S10 flashing check engine light no cummunications
Posted to Technical Discussion Forum on 8/15/2015 5 Replies

Hello Rob

I read the operation of field service mode from the web page,it must be a mis-print because its written in reverse:open loop should state rapid flashes,where as closed loop should indicate 2.5 intervals. This might present a problem for Andy. Diag... Login to read more.

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