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Why does check engine light stay on in 1990 Prelude Honda?

Updated: 8/20/2019
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11y ago

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It is on because the ECU has detected a problem with the emissions system. Once the problem is repaired the light will go out after you drive a few cycles. You can turn it off by disconnecting the negative battery cable for 5 minutes but it will just come back on unless the problem is repaired.

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Q: Why does check engine light stay on in 1990 Prelude Honda?
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