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You can disconnect the battery terminal, wait 10 seconds and then re-connect, this will reset the onboard computer and the check engine light will go out. However, this only resets the computer and does not solve the underlying problem with the vehicle. To correct the problem the code will have to read by a scanner and this will give some idea as to the problem with the vehicle.

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Q: How do you reset check engine indicator for 2002 Lexus ES300?
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