There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.
To reset the "Service Engine Soon" light on a 2004 Nissan Armada, first ensure that the underlying issue has been resolved. Then, you can use an OBD-II scanner to clear the trouble codes, which will turn off the light. Alternatively, you can disconnect the negative battery terminal for about 15 minutes to reset the system. Remember to reconnect the battery afterward.
reset service engine light
A reset Engine Service Light comes on when an issue comes up with in the engine. This light can be reset by a tech or by fixing the problem.
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There are a couple of ways to reset the Service Engine Soon light on a Suzuki Grand Vitara. The easiest way is to get a scan tool from your local auto parts store. Using the scan tool will reset the service engine light. Disconnecting your vehicle's battery is another way that often works to reset the Service Engine Soon light.
The service engine light has to be reset with a scanner. Disconnecting the battery will not work. The light will come back on unless you make the necessary repairs.
The service engine or check engine light can be reset with a scan tool or by unhooking the battery. The light will return if the failure that caused the code is not repaired.