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I replaced because of this code.

Thank you for your response. I'll try that in the am and see if that hopefully does the trick. If that dosen't work any other suggestion that I could look into Id appreciate them.

This started when I switched the tune from 250 to 275 sdt tuned I had P2263 dtc pop up no other codes. I still have full boost, no loss of power, fuel economy is still good. I changed out the exhaust back pressure sensor, cleaned the tube about two weeks ago and I am still getting the P2263...