I am having he exact same problem only I have not had the PCM reprogrammed. I have the old pre cat sensors in place and have yet to swap in the new ones. I had assumed it was the old sensor but your thread here has me worried. I will get on swapping those sensors this week.
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Gone- 02 boxter s
02 911 carrera2, full leather, tubi exhaust, colored gauge faces, agency power short shift, DOF IMS fix, litronics, tech art shifter, spin on filter adapter
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