I have an 08 Saturn Astra XR. It won't come out of 1st. Throwing code p2096 post catalyst fuel trim system too lean bank 1. Put on new o2 sensor on both streams and I cleaned out mass air flow. Help?

P2096 OBD II Trouble Code Post Catalyst Fuel Trim System Too Lean Bank 1... https://repairpal.com/obd-ii-code-p2096-post-catalyst-fuel-trim-system-too-lean https://www.obd-codes.com/p2096

here is the code, possible problems.

P2096 OBD II Trouble Code Post Catalyst Fuel Trim System Too Lean Bank 1...

P0300 is a random miss fire , a vacuum leak can cause this as well as low fuel pressure ! weak fuel pump , clogged fuel filter !
DTC P0171: Fuel Trim System Lean Bank 1
DTC P0174: Fuel Trim System Lean Bank 2 These two codes are saying the PCM - engine computer is see a lean condition .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
Circuit/System Description
The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor.

You don't say what make , model an year vehicle ! These are for GM vehicles , yours could mean something else . Except the first three , those are genaric codes , same for all makes ! So can't say what this codes are P2097, and P2099 ! Can't mean this P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
P2099 - Post Catalyst Fuel Trim System Too Rich Bank 2

bring it to the auto zone and ask them .

1st google hit.
P2096 Suzuki - Post Catalyst Fuel Trim System Too Lean
to see this steps read the FSM. it covers this.
lots of tests. not guessing.
Low fuel pressure
- Misfire condition
- Large vacuum leak
- Air leak near sensor
- Plugged catalytic converter
- Lean air/fuel ratio
- Faulty front O2 sensor

This is Subaru's definition for this code... DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1; check this diagram about muffler assembly...

code #0406 = egr position sensor circuit high ( stuck egr valve or bad egr sensor most likely sensor )

code #2096 = downstream fuel trim system lean ( see next code )

code #0137 = O2 sensor bank 1 sensor 2 circuit low ( replace rear O2 sensor driver side )

code #2299 = brake peddle position/accelerator pedal position incompatible. ( hav you been power braking this truck? ) ( brake light was on wile accelerator was being pushed )

put a new rear O2 sensor and it fixed it. Only problem you might have is if you have an aftermarket downpipe. If it is Catless then you are going to need some type of tune, opensource, Cobb AP, etc.... Even if it is a high flow cat then you will still need a tune because it will throw a code 75% of the time. If your stock cat is still on then replace your rear O2 sensor and that should fix it. Could be something else but mine was the exact same problem.

P2096=Post Catalyst Fuel Trim System Too Lean Bank 1,
drivers side was too lean at one time and set code,You should hhave the code erased and see if it returns again,

P2096= Post Catalyst Fuel Trim System Too Lean

P0137= O2 sensor voltage low bank 1 sensor 2