Thread: check engine light on 2013 M3
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      12-17-2013, 01:53 PM   #19
Leonardo629
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Drives: 2013 M3 Coupe
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It's illegal to mess with the readiness..that's why tuners like ESS will will code out the light but not mess with the OBD2 readiness status.

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Originally Posted by tinman831 View Post
I thought these tunes keep the readiness statuses completed.
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