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it is your 02 sensor/ bank one usally means the one before your cat. convertor
"Lean Bank One" means that the first bank of cylinders, or 3 cylinders on your V6, are not getting enough fuel to mix with the air, hence the term "lean". This is usually solved by cleaning the fuel injectors, and this is most likely your problem, because if the fuel filter or pump were clogged you would have gotten a code of "Lean Bank One" and "Lean Bank Two". It is possible it could have something to do with your oxygen sensor, and the first answer mentioned, because this sensor measures exhaust gas and sends a voltage signal to the computer telling it how rich or lean the engine is running.
What else can I help you with?
What is the firing order for a 2002 Pontiac Bonneville 3800 engine?
What is the firing order for points and plugs on a 2002 Bonneville?
Where is the thermostat located on a 2002 Pontiac Bonneville?
The 2002 Bonneville with a 3.8l engine has the thermostat in the top radiator hose inlet. A different engine any use a different location.
How do you reset check engine light on 2000 Pontiac Bonneville?
Disconnect positive side of battery for at least 5 minutes, worked for my 2002 Pontiac Bonneville. Dealer wanted $50.00 can you say rip-off!
How do you repair a check engine light on 2002 Jeep Liberty?
Click on the link to your right for more information.
How do you reset the check engine light in a 2002 Toyota Camry?
It is reset with a OBD2 scan tool, after the repair of the system.
Where is the ignition control module located 0n a 2002 Pontiac Bonneville?
somewhere on the engine
How do you reset the oil life indicator on a 2002 Bonneville?
turn key on/engine off. step on gas pedal 5 times light should go out. key off. start engine and check lite.
How many engine mounts does a 2002 Pontiac Bonneville have?
it has 4 mounts , 2 engine mounts, and 2 transmission mount
Where is the crankshaft sensor in a 2002 Bonneville?
it's on the engine block you have to take the alternator base and is under that
Blinking check engine light on 2002 mercury sable?
If your check engine light is blinking that means an engine cylinder misfire has been detected - have the vehicle scanned for any trouble code(s) to help diagnose and then repair the problem
What is the oil capacity of a 2002 Bonneville?
The 2002 Pontiac Bonneville equipped with 3800 Series II engine has an oil and filter capacity of 4.5-quarts. The AC Delco oil filter part number for this application is PF47. The larger and higher capacity PF52 filter will also work on this engine.
Can a coolant leak in a 2002 Bonneville be fixed?
In general, yes a coolant leak in a 2002 Bonneville can be fixed. The issue whether it is worth the money to fix the leak. If the coolant is leaking from an upper or lower coolant hose, the repair is simple and inexpensive. If the coolant leak is from the radiator, it will be a bit more difficult and/or expensive to repair. Moving up the scale, if the coolant leak is coming from a manifold gasket, it will be still more expensive. Likewise for a coolant leak from the heater core. And at the upper end of the scale, if you are leaking coolant from a cracked engine block, you're looking at replacing the engine.
