codes not throwing a check engine light

tyler2k

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so, I have an issue where I have no check engine codes and no rough running issues but if I check codes with the scan gauge it shows codes for cylinder contributions on cylinder 5 and 3. it also has the generic one for the egr ****** but I know why that's there. it has new injectors and I'm unsure if they were there before the injectors were done.
 

tyler2k

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I'm just not getting why it doesn't throw the light, and they have been there for at least 15k
 

tyler2k

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light isn't burnt out, it lights on at start, I have an 03 so the ear code wouldn't pop a light a believe. I've heard of soft codes but have never had a vehicle with any before
 

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