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CEL(O2 Sensor) After Switch Tune

JISUN_GTI

Passed Driver's Ed
Before:
APR Stage 2 Tune
Apr Dsg Tune
Apr Full Intake
Apr Intercooler
Apr Downpipe + Rear o2 Sensor
R8 Coil


Now:
Cobb Accessport with Stratified Tune
Apr Dsg Tune
Apr Full Intake
Apr Intercooler
Apr Downpipe+ Rear o2 Sensor
R8 Coil
Borla Catback

After i switch to Stratified Tune with Cobb Accessport and i see 3 Different CEL. I see them One By One and next day it goes away and it start to show again.

I contact my local mechanic who install all APR Mods, and he tells me i need to switch to Catless Downpipe because stratified tune only support Catless downpipe...

is this True? anyone have same CEL issue? how did you guys solve?

CEL Code: P2271 / P2096 / P013A
 
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