Vehicle Questions and Answers
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There is no way to turn off the check engine light in the car. It illuminates when there is a problem with the vehicle, but the issue could stem from various causes. Therefore, it's not worth your while to seek out a random problem unless it's glaringly obvious. The best course of action is to bring the car to a mechanic who can use an OBD tool to scan it. This will enable them to identify the trouble code and pinpoint the problem area. Once you are aware of the problem, you can proceed with getting it fixed, which will in turn deactivate the light. It's advisable to first check the gas cap and fuel door though. If the cap is missing or the door is open, the light will come on. This is a trivial matter to take to the mechanic, so ensure you check this beforehand.
To turn off the maintenance light on a 2007 Lexus RX 350, start the car with the engine off and press the odo/trip button until the odometer displays all zeros and the maintenance light goes out.