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Most vehicles need a couple drive cycles for all the monitors to report to the ECM that everything is in good working order. A drive cycle consists of a cold start (sitting overnite), turning on electrical accessories (heater or AC, lights, etc) some city driving and some highway driving. Depending on the vehicle and your driving habits it could take several cycles.

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6y ago
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Q: How long do I drive my car after resetting check eng-lite.?
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