Hi all, my 03 XR6T is having some issues, had problems with overboost, mainly in the cold. Ive had dtc P1131, P1132 and P1227 and replaced the O2 sensor twice. Codes, and boost of up to 8psi, were detected on Torque app which is now also showing "open loop system fail" and car is intermittently idling really rough. Im assuming, even if the O2 sensor is gone again, the problem is elsewhere. Any help greatly appreciated. I'd like to fix it myself as I don't know of any good tuners around here.

Edited 05/11/13 01:06 PM05/11/13 01:06 PM by FoMoCoMoFo

Replaced the o2 again, all seems fine.....for now, 3rd o2 in 12 months! Either I'm very unlucky or something is causing them to fail.

mines the same, replaced 02 sensor nd after 3 months failed, so replaced under warrenty and now its the same again......with bosch sensor and ebay PEX? sensors

Burning coolant can cause the o2 sensors to become faulty?

Perhaps bad batch recently all made in same factory among different brands.

Had an injector fail on me and haven't had any issues since that was fixed! So I'm going with that, fingers crossed.