Throwing 2C31 & 2096 Codes PLZ HELP!?

[Bwell24]

Hi, my name is Brandon, I'm new here on the forum so please feel free to school me on any etiquette if I break rules or fail to find previously archived threads regarding the same topic.

Recently (3-months ago) I purchased a black sapphire metallic 2010 BMW 535i xDrive (N54/E60) with just over 100k on it. Got a 24k aftermarket warranty. Ran great at test drive and only needed front brakes replaced at purchase.

Since purchase I've upgraded/modified the following successfully:

• Cobb AP Stage 1+FMIC Flash/Map
• New Front Brake Pads & Rotors (OEM)
• New Evolution Racewerks FMIC
• New Evolutiom Racewerks Charge Pipe
• New HKS SSQV Blow-off Valve
• New Spark Plugs (OEM)
• New Injen Dual Cone Air Intake
• New Low Pressure Fuel Sensor (OEM)
• New Electronic Water Pump (OEM)
• Chemcal Engine Flush

Obviously the tune-ups/fixes/upgrades/modifications were expensive — but I wanted to increase my HP & torque and make sure the engine was breathing correctly (had enough air intake for added power via chip + mods) and all issues were addressed.

She was running like a raped ape all day today and then while I had her Cobb chipped she started sort of bouncing or hesitating on aggressive acceleration and then throwing codes P2C31 (at first) and then P2096 in addition (later on, after I uninstalled Stage 1+FMIC maps).

Now the check engine light is on (with no flash) and the Cobb AP is consistently giving me those 2 codes?!

P2096
P2C31

CAN ANYBODY PLEASE HELP?

I am a new and first time BMW owner and would appreciate anyone's time/feedback who may have experience with the issue! Thank you in advance.

Brandon

[MIKYZZ4]

P-codes can be notoriously unreliable, even though I suspect an intake leak,
Have a diagnostic scan performed with a BMW specific scan tool/software.

[MIKYZZ4]

Btw, double check that O2 sensors were installed correctly,
so that bank 1 & 2 sensors and connections are not X'd,
As I've read that is a possibility in your situation.

[Bwell24]

Btw, double check that O2 sensors were installed correctly,
so that bank 1 & 2 sensors and connections are not X'd,
As I've read that is a possibility in your situation.

Thank you so much for the reply, I'll have my mechanic check front & rear O2 sensors!