[CaptainKirk2008]

I read here that BMW is the "King of Codes" Good God is that6 ever right, right?

Need some diagnosis help. 2008 N54 335i 6-Speed. Downpipe cat delete, JB4 Stage 2, Charge Pipe. Intermittently throwing the following codes and after cool down for just a few minutes, starts up and runs fine. Reader provides the following:
P114B Post Cat Fuel Trim Via 02 Sensor too lean
P0041 Oxygen Sensors Swapped (???) Bank 1 Sensor 2, Bank 2 Sensor 2
P0420 Catalyst System Efficiency Below Threshold Bank 1
P0430 Catalyst System Efficiency Below Threshold Bank 2
P142E Cylinder Injection CUt off Pressure too low in High Pressure System

Car has 112K and I am thinking maybe it's time for all 02 sensors to be replaced, just because. Maybe the LPFP should be as well.

Have read MAF if dirty or ready for replacement can cause the lean read too.

Don't mind throwing money at replacement parts, but the time required to do this is more of a concern since I don't have that much free time. Can you guys point me in a good direction given your experience with the alterations and the JB4?

Thanks in advance!

[relative4]

Replacing parts at random is a great way to keep the economy going at the price of your own financial solvency. A way to fix your car, not so much.
Step 1 is get a BMW-capable scanner.

[CaptainKirk2008]

Originally Posted by relative4

Replacing parts at random is a great way to keep the economy going at the price of your own financial solvency. A way to fix your car, not so much.
Step 1 is get a BMW-capable scanner.

So the scanner I have might not be the same as a BMW capable scanner? Ok, hmm....I'll search this but if you know exactly what I should buy, I'm all over it. If you don't mind responding just once more, I'd be in your debt! Heading to the Wild World Web now..................

[type-dRew]

Solid scanner here

https://www.ecstuning.com/b-schwaben...020sch01a~scf/

Edit;

Also a good deal, very similar

http://www.foxwelltool.com/wholesale...e-and-obd.html

[Jklad]

With a tuned and modified car you'll want to make sure you have a decent scanner, which any of the tunes already contain. Also need to learn more about your car. Otherwise you will end up replacing random things that don't exist like MAF sensors lol.