2006 Chevy Aveo

oxygen sensors can't be cleaned. They're porous. If they're silled with soot, you have to replace them. Plus, O2 sensors don't caused lean codes, they only report them. Stop looking at the oxygen sensors and look for a vacuum leak, low fuel pressure or clogged fuel injectors.

You can reset it with the battery for 30s just remove the negative plug

means misfire in #5 cylinder. found this for you. hope this helps
Common Problems That Trigger the P0305

• Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable)
• Incorrect ignition timing
• Vacuum leak(s)
• Low or weak fuel pressure
• Improperly functioning EGR system
• Defective Mass Air Flow Sensor
• Defective Crankshaft and/or Camshaft Sensor
• Defective Throttle Position Sensor
• Mechanical engine problems (i.e.-low compression, leaking head gasket(s), or valve problems

Common Misdiagnoses

• Fuel Injectors
• Oxygen Sensor(s)
• Power Train/Drive Train problem

I am working on the same problem. This 2000 ZX2 was idling rough and throwing a p171 code (bank 1 too lean). I hooked up a scanner to the OBDII port and you could see the O2 sensor at 0 or very low voltage and not switching and the fuel compensation maxed out which indicates a lean condition. Using a flammable Carb cleaner and the engine running I sprayed around the vacuum hoses until the idle picked up. I found a rubber elbow that connects to the bottom of the intake maniflold and feeds vacuum to the PCV valve. Replacing the the elbow with a suitable replacment from the auto part misc parts cards display had it running smoothly and the O2 sensor switching properly. Since this was happening at idle it was not the fuel filter which can cause a lean condition in upper rpms. It is not the MAF or the O2 sensor since it switches when not at idle. Also check the smaller vacuum lines that go to the evap control from the intake vacuum ports (back of manifold just below the throttlebody, most will be cracking if your car is anything like mine. I have also seen this problem with a bad PCV valve.

Did you try replacing the crank sensor.There is a service bulletin for the crank sensor causing stalling on these models.Hope this helps.Good luck.