Catless DP and limp mode?

[mk5.leo_]

I have a 2020 3.0 with the follow mods:
CTS CAI
Catless DP
O2 sensor spacer
Mhd stage 2 91 OTS tune

I’m having an issue where I was driving perfectly fine, and all of a sudden my car wouldn’t make over 8 psi WOT. I’ve also had a weird intermittent CEL over the past week or so. If anyone has any insight it would be greatly appreciated as to why my car is targeting such low boost/ throwing it into limp mode. Thank you

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[itzTang]

Have you tried changing the rear o2?…..

 

[mk5.leo_]

Have you tried changing the rear o2?…..

Is the code stating open circuit usually caused by a bad O2? And would it throw me in limp mode

 

[stefastn]

Is the code stating open circuit usually caused by a bad O2? And would it throw me in limp mode

open circuit = no power/no connection

 

[Extreme Power House]

start by removing the spacer

the car should give you a catless code but run fine.

if the limp mode is gone, you know the problem. if it still there after you cleared the codes, report back

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