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My check engine light came on 4 days ago and have stayed on since then. What could be the trouble?

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Is the check engine light on ?
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My 2004 Envoy XUV check engine light stays on. I had the truck parked for 4 months until I had the money to repair the Transmission. Now I can't get the truck to pass emissions. I had a complete t


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What was replaced before may have been a different
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You should have the past codes & bills for work done
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Hi, the Check Engine light and the cruise light blinking tells you the computer found a problem with your vehicle's running condition but if the vehicle is driving OK, a Check Engine light is not a reason to pull over and get the problem fixed soon. In testing areas, you will fail your emissions test if the Check Engine light is on and fuel economy generally suffers when the Check Engine light is on. When the Check Engine light is on, one or more "trouble code(s)" are stored in the computer and you can read and erase trouble codes using inexpensive code-reader tools from auto-parts stores; the tools are very easy to use. The problems identified by the codes are frequently easy to fix (such as a loose gas cap), but some are complex, requiring professional diagnosis. A trouble code indicates a circuit where the problem was identified, not necessarily the component itself. Diagnosis is often necessary.

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what you could start with is checking to see what trouble codes are being logged for this vehicle...if the engine light stays on, it means the ecu is registering a fault......by the means of a trouble code...now the trouble code doesnt tell you how to fix it, but it does give you the direction to go down...judst wondering if you have tried to obtain the trouble codes

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Any time that the check engine light comes on, it indicates that the computer has found a condition serious enough to require service action. Rent a scanner, read the code(s), and pursue to repair(s). The scanner will clear the trouble light when the repairs are complete.

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There is a dead cylinder, so its not getting a spark at one spark plug. Check it at Autozone for free, that will tell you where the trouble is.

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