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

asked by on December 22, 2015

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.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

I am having a problem with degraded acceleration/mileage.

I would recommend checking/testing the O2 sensor and the MAF (Mass Air Flow) sensor. When either of these two sensors are not working properly, as you may know, they will send inaccurate signals to the ECM which will then, in...

Getting several codes fuel system too lean, Misfire cylinder 3 fuel cut off, misfire detected with low fuel

System too lean means that the fuel mixture has moved beyond the ability of the feedback system to compensate. One thing that can cause that is an air leak that enables air to enter the intake system without passing first...

I just a BMW X6 and I want to know the ideal grade of gas I use in the car

Use at least 91 Octane fuel, commonly known as premium. Modern vehicles have knock sensors so you might be able to use as low as 89 octane but 91 octane is preferred. If you have further questions or concerns, do...

Related articles

Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
A Buyer’s Guide to the 2012 BMW 5-Series
BMW BMW has built a reputation for refined engineering, powerful performance and excellent fit and function. That’s exactly what you’ll find with the 2012 BMW 5-Series sedans. Composed and powerful, they provide a range of price points, features and capabilities...
How to Purchase a Pre-Owned BMW
BMW BMW offers a wide selection of luxury cars. In many circles, owning a BMW is a sign of success. While most balk at the price of a brand new BMC car, pre-owned models provide a viable alternative if you...