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If it has a downstream O2 sensor the check engine light will come on but if it does not the light may not come out. In most instances it will set the check engine light.

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โˆ™ 2012-09-28 18:22:13
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Q: Would light come on if problem with catalytic converter?
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Jeep Cherokee check engine light?

It could be an emissions problem or a catalytic converter problem.


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A flashing check engine light means that you have a problem with your engine that may cause harm to the catalytic converter.


Does the check engine light come on if the catalytic converter needs replacing?

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You replace your catalytic converter now engine light is on how could you correct this problem?

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Why does my engine light blink on and off continuously?

A flashing check engine light indicates that you have problem that will damage the catalytic converter. You should have the check engine light checked very quick/tomorrow,if not sooner. converters cost over $800.00. A flashing check engine light indicates that you have problem that will damage the catalytic converter. You should have the check engine light checked very quick/tomorrow,if not sooner. converters cost over $800.00.


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Yes it would but that doesn't mean it is the cat


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