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Q: What causes check engine light to be always on?
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What causes the check engine light to go on a 2001 GMC Jimmy?

Check your gas cap.....My check Engine light always comes on if it is loose or not on at all.


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There are dozens and dozens of causes for the check engine light to stay on. You need to have the computer checked for codes to know possible causes.


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The check engine light on a 2003 Honda Accord will be triggered when something on the engine is malfunctioning. To rid the check engine a light the ECU will need to be reset.


Check engine light stays on what causes it?

The Check Engine Light (CEL) lights up when the Engine Control Module (ECM) detects a problem related to emissions or performance.


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There are pages and pages of causes for a check engine light. You need to have it checked for codes with a scanner to know what to diagnose. After the repair you can clear the code with a scanner.


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What causes the check engine light to come on in a Toyota Sienna?

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What causes check engine light to blink on and off?

Check to see if your gas cap is tight.


What causes jerking and power loss and check engine light?

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