Skip the auto shop - Our mechanics make house calls

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

asked by on

BMW started the car from the night before and just started this problem from one day to the other.

My car has 101622 miles.
My car has an automatic transmission.

A: System too lean means that the fuel mixture...

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 through the air flow meter. When that code is accompanied by a misfire code, it can mean a vacuum leak somewhere near the cylinder that is mentioned in the code. Check for any broken vacuum hoses, particularly around the #3 cylinder runner. Not finding that, I would suspect a possible intake gasket leak. A YourMechanic certified technician can be dispatched to your location to perform an Engine is misfiring Inspection on your vehicle and help you diagnose and repair this issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: Check engine light

Did the cam shaft or cam shaft sensor get replaced. You are having misfires and should get the vehicle scanned to see if one of the codes is to a misfiring cylinder. You may have leaking oil from the valve...

Q: 7 codes transmission shifting bad could it b ecm

Having that many codes that go to one component may want you to quickly condemn the ECM. However, the vehicle should not have the ECM replaced until one or more of the codes retrieved calls for the replacement of the...

Q: Truck refuses to go into four-wheel drive

There is usually a certain procedure that is necessary for the switch to four wheel drive, such as selecting the neutral option on the transmission, or being stopped. If you have tried these and the vehicle still will not switch,...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...