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There are several causes for the engine light to come on. The most common problem is the oxygen sensors. If you decide to replace the oxgen sensors, make sure you disconnect the negative battery cable before you replace them. Otherwise, the engine light will still come on. Another cause can be the mass airflow sensor. The best thing to do to be 100% sure is to have the dealer diagnose it. Good Luck!

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Q: What causes the check engine dash light to come on in a 1994 thunderbird 4.6l?
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