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diagnostic computer question 200 1989

This is my first brick with a diagnostic computer, and I can't find the answer to this question anywhere: does it make a difference if the car is running or not when you run the diagnostic check? As I understand it, the computer stores up codes as it goes along until you clear them, but I can't figure out if it does anything different if you check for codes with the engine idling.






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New diagnostic computer question [200][1989]
posted by  scorch  on Thu Jun 10 07:11 CST 2004 >


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