My 2000 Maxima has very rough idle and most of the time stalls right after I start it. Computer says bank 2 lean and manufacturer misfire, replaced all plugs knock sensor and mass air flow sensor no change, It has 114,000 miles on it. Driving on the road it will sometimes act like its skipping but not in the transmission. Help!

If you're experiencing a rough idle in your 2011 Nissan Altima, the first thing you should do is diagnose the issue. The Torque app can provide you with some diagnostic codes which can help you narrow down the problem. In your case, two current fault codes and two pending fault codes were recorded. The current fault codes point to a system that is running too lean on Bank 2 and misfiring in multiple cylinders. The pending codes indicate a system that is too lean on Bank 1 and a cylinder 2 misfire.
To start troubleshooting, you should begin by checking the spark plugs and ignition coils. Both of these components are integral to the proper functioning of the engine. If they are faulty, they can cause misfiring and rough idling. You should also inspect the mass air flow sensor, as a faulty one can throw off the air-fuel ratio of the engine.
Finally, if the problem still persists after inspecting the spark plugs, ignition coils, and mass air flow sensor, then you should consider consulting a professional mechanic for further diagnosis. They can provide a more accurate assessment of the issue and recommend the best course of action.

Definition of Diagnostic Trouble Code P1506 Audi: Closed Throttle Position Switch Does Not Open/Short to Ground BMW: Idle-Speed Control Valve Opening Solenoid Control Circuit Signal High Ford: Idle Air Control Overspeed Error (see P0507) Jaguar: Idle Air Control System RPM Lower Than Expected - B Bank Kia: IAC Valve Opening Coil Voltage High Lincoln: Idle Air Control Overspeed Error (see P0507) Mazda: Idle Air Control Overspeed Error Mercury: Idle Air Control Overspeed Error (see P0507) Porsche: Throttle Jacking Unit Lower Mechanical Stop, Signal Implausible Volkswagen: Closed Throttle Position Switch Does Not Open/Short to Ground Volvo: IAC Valve Opening Signal
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Definition of Diagnostic Trouble Code P1151 Audi: Bank1, Long Term Fuel Trim, Range 1 Leanness Lower Limit Exceeded BMW: Oxygen Sensor Heater Circuit Signal Intermittent (Bank 2 Sensor 1) Ford: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Jaguar: Lack of H02S-21 switch, sensor indicates lean Land Rover: Lambda control limit bank 2.Implausible signal/condition Lincoln: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Mazda: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Mercury: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Subaru: HO2S-12 Heater Circuit High Input Toyota: Coolant Path Clog Up for Coolant Heat Storage System Volkswagen: Bank1, Long Term Fuel Trim, Range 1 Leanness Lower Limit Exceeded
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Definition of Diagnostic Trouble Code P0302 Category: Powertrain Definition: Cylinder 2 Misfire DetectedNote: This definition of P0302 is applied to all manufacturers
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Definition of Diagnostic Trouble Code P0171 Category: Powertrain Definition: System Too Lean Bank 1Note: This definition of P0171 is applied to all manufacturers

Intake or vacum leak will be the first codes 174,171, try idle and spray propane around intake if car idles up, then intake is leaking, otherwise could be a broken vacum line, check with a gauge

To review - - the intake valve solenoid valve controls the flow of oil thru the control valve to adjust valve timing.
The code means the computer "sees" the valve timing as out of range and/or not controllable.
Possible causes could be a defective or stuck solenoid valve, dirty oil causing a blockage, a faulty cam sensor or faulty crank sensor.
Other than changing the oil and filter, the components would need to be checked with a scanner that can look at live data.

the misfire would cause the lean code to come pop up. change your spark plugs and or coil connectors(the rubber boots on the coils)

P1137 is HO2S Bank 1 Sensor 2 Lean Or Low Voltage. Oxygen sensor is reading a "lean condition". This code probably is stored from the rough and low idling. So it sounds like you maybe having other issues causing this P1137 code to come up. For lean conditions read this:
1. Vacuum leaks - check for failed or loose vacuum lines, leaking intake gaskets, intake air tubes loose or any other source of un-metered air leaks (leaks after the Mass Air Flow Sensor)
2. Restricted fuel filter or bent/pinched fuel system lines
3. Incorrect input from other sensors, such as the Mass Air Flow Sensor/cam or crank sensors, which may not always drop a separate code
4. Engine misfire ? Yes I know this one may seem weird. You might think that if there is a misfire then you will have all that unburned fuel and it should read rich; right? Well the O2 sensors read only oxygen content in the exhaust, so if you have all that unburned fuel from incomplete combustion then, you guessed it, you also have all that unburned oxygen. High O2 content in exhaust equals a lean reading!

P1131 Lack of HO2S-11 Switch ,Sensor Lean
P1151-Lack of HO2S-21 Switch ,Sensor Lean
PO171- System to Lean (Bank 1)
PO174-Systen to Lean (Bank 2)

Fuel Filter -Plugged
Low Fuel Pressure
Evap System -Leaks
Leaks - in ducting,air filter to throttle
PCV -Leaks
Exhaust System -Leaks
O2 Sensors-worn out

Bad injector ?? Bank 2

Air leaking around injector -driving O2 Lean

2197--trying to correct for over rich condition

Coil misfires

TPS Sensor

MAF ?

You need to take out fuel
at least at idle

time to get the engine properly scanned, real time not code scanner, then you will have the readings from sensore and actuators, diagnose from there

Those codes are for the oxygen sensors, lean fuel mixture on both banks. Change them, problem with stalling and rough idle should go away.