Q: Misfires of several cylinders on highway drive

asked by on

The car moves fine both in city and highway drive, but the engine misfires on highways when l press the gas pedal for a kickdown in the the process of overtaking other vehicles. Precisely when the rpm reaches a point beyond 5 the engine losses power, check engine light shows on the cluster. But when I reduce power or even stop, putting off the ignition and start the engine again, the engine regains full power, check engine light disappears and the car moves smoothly again until another kick down for the problem to reoccur again. After scanning the following codes appeared: Cylinder 6-2745, Cylinder 4-2747and Cylinder 3-2744. Then torque request via CAN 3D33. Best regards.

My car has 100000 miles.
My car has an automatic transmission.

Hello - this is a known issue, and BMW has a technical service bulletin out to address this (#385317). A software upgrade to the engine management computer is the repair for this. You should check with your BMW dealer’s service center for this repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Misfires of several cylinders on highway drive

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

Q: Emergency brake rusted to wheels

Hi. I'm not exactly sure what you mean, but the parking brake cable may be seized. Rust on the face of a brake rotor or brake drum is normal and not a cause for concern. It looks like your parking...

Q: Codes P0088 & P1186, Hyundai IX35 CRDI 2.0 2014 model

Hello Milton. It seems that you have an fuel pressure issue. There are two electrical components that contribute to how fuel is regulated. They include the fuel pressure regulator, and the fuel rail pressure sensor. Due to the age of...

Q: I replaced my camshaft sensor and it's leaking oil from under it

The Camshaft Position Sensor (CMP) has a small O ring around the flange where it fits up against the engine. Most of the time when I've bought those parts, the O ring has come on the part, so you don't...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...