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No, it doesn't work that way. To set a code it is watching for open or shorted circuitry and/or frequency response on the signal line when the engine is obviously running. It doesn't/won't throw a code if it 'hears' an engine problem - it only checks itself.
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ASE Certified Master Automotive Technician w/L1.
ASE Certified Master Medium/Heavy Truck Technician.
Certified EVT (Emergency Vehicle Technician)
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