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Boxster OBD II Info


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I recently got a check engine light about 200 miles after installing the EVO HighFlow Kit. I bought the Digitimoto OBDII system and ran the OBD II test. I only had one code - P1125 that showed up as a Throttle Position Sensor Intermittent. I'm reading on here that Porsche P1125 is Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold. What is most likely the cause of this code and how can it be fixed? I reset the ce light and ran the car for about another 15 minutes and the light never returned. Could it just have been a one-timer?

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Loren:

Are you talking intake air leak before or after the throttle body? If before, how would it know if there was a leak when so much additional air is flowing by with the EVO High Flow kit? Is it an after the MAF sensor type leak where the flow rate numbers read by the MAF don't match the flow rate numbers through the throttle body?

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If only...

That would involve reinstalling the entire air box assembly (which did NOT make it out in one piece.) I suppose I'll just drive it for a while and see if the code returns. If it comes back I may be in the market for a used Boxster air box and a gag to keep my wife's mouth shut ("I told you you shouldn't add anything to that car!") :lol:

Thanks -

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If you get the light again read the code(s). Double check the clamps, and the your dip stick is seated and the oil cap is on tight. If the MAF does not see what it thinks it should see then it tries to adjust the mixture, but it has a limit. In the book it is called the lean limit for your fault code.

Per Peter there is an issue with some intake modifications as the MAF goes out of wack.

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