list all sensor devices related to code 26 on 1995 Saturn SL1

do not know the diferance between SO and DO engine. Please clarify.

by in Las Vegas, NV on July 03, 2011
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1 answer
ANSWER by , July 03, 2011
dual overhead has spark plugs in the center of the valve cover. the single overhead has the plugs in the front of the head. Roy