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Dear Mr. B>
Hope you're well. There is no switch to turn-off the "Check Engine Light". That light comes-on because there's a malfunction, that affects pollution-controls, e.g., if the oxygen sensor fails. Repairing the failed item causes the light to go out.
In some cases, it is needful to disconnect the negative battery cable blamp from the battery's negative terminal. Cutting power will require You to use the radio's four-digit security code to return the radio to operation.
If the "Service" light is on, that can be turned-off. On the left side of the speedometer, there's a "button" accessed by removing a small black rubber plug in the instrument cluster's clear plastic faceplate. The plug can be removed by using a small, flat-blade screw-driver. Then, use a ballpoint pen to push on the "button".
Go gently, when replacing the black rubber plug in the instrument cluster's faceplate. If too much force is used and the rubber plug ends-up behind the instrument cluster's faceplage, the cluster must be removed and dismantled to allow the plug to be recovered.
Hope this helps.
Yours faithfully,
Spook
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