Q: SES light comes on and power drops when accelerating to 4000 RPM, after which it drives fine.

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When accelerating quickly up to 4,000 RPM the SES light comes on and there is a noticeable lack of power to get up to speed. Then the SES light shuts off and the car drives fine. It has only happened a couple of times.

Since this is an intermittent problem it may be difficult to diagnose. The first thing I would recommend is to have a technician check your vehicle for trouble codes with an OBD2 scanner. If the check engine light comes on at all, it will usually store a code in the system. Once the code has been pulled this issue will be easier to diagnose. It may be an intermittent failure of one of your engines many sensors.

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