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Check engine light on, no codes

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Old Jan 2, 2025 | 07:32 PM
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Default Check engine light on, no codes

I have a 2004 LS6 that I did a swap with. The check engine light remains on but I have no codes. The only thing I can find is that it says it is not ready for an emissions test but I dont need any emissions test on this swap. Any ideas?
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Old Jan 6, 2025 | 09:27 PM
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Wired wrong.
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Old Jan 7, 2025 | 12:23 AM
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Is it the check engine light or service vehicle light?
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