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Registered
Join Date: May 2012
Location: Edmonton, Alberta
Posts: 102
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P0203 is injector #3 open circuit. Plugged in properly is first and if you want check the injector terminal 1 to 2 for resistance. It should be 11-13 ohms at 72F. The DME controls the ground circuit and battery voltage with key on is at terminal 1.
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