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Why does the check engine light on a 1997 mercury sable stay on after replacing egr valve and egr sensor?
Wiki User
∙ 17y ago
You need to reset the light with a OBD2 scan tool, after a repair. If you did reset the light and it just came back on, then you have not found the problem. Remember when reading codes, the code does not tell you what component is bad. It only tells you what component is being effected.
Wiki User
∙ 17y ago
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