Skip the auto shop - Our mechanics make house calls

Q: Code says Lean bank 1 and 2

asked by on

Code is lean bank 1 and 2 and the first time I start it of the day it sputters for about 5 seconds and the rest of the day it starts fine but you can smell a fuel smell

My car has 105000 miles.
My car has an automatic transmission.

A: Hi there. It sounds like there could either...

Hi there. It sounds like there could either be an air leak or sticking O2 sensors. I have personally seen O2 sensors that become stuck lean/rich and create a host of problems with the air/fuel mixture readings; I’ve also seen low fuel pressure do similar things. The stored codes lead us to the air/fuel system and all that’s left is using the data, freeze frame and current, to determine where the fault is occurring. This would involve active tests being performed with a scan tool while monitoring the output data, testing the O2 sensors, testing the fuel pressure, and checking for possible vacuum leaks/restricted injectors. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a check engine light inspection.

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: Car won't turn off

Hello. Thank you for writing in. This may seem like magic or voodoo, but the vehicle not turning off happens more than one might think. To start, lets discuss the fact the battery does not power the vehicle when the...

Q: I have 2007 Infinity G35 6-speed. I can go threw all the gears and shift them in an out without the clutch pushed in

Hi there. Check to see if the clutch is engaged at all times. Check the slave cylinder to see if it is fully engaged and not releasing. Look for the return spring on the fork or on the slave cylinder....

Q: AC running but not blowing.

When your heater control valve fails, this can cause the vehicle to heat one side and not the other on a dual zone system. I would recommend having your heater control valve tested using the manufacturer's recommended procedure to ensure...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.