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P0102 - mass or volume air flow circuit low input, 99 Boxster

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Hi,Can someone tell me what is mass or volum air flow circuit low input mean or what to look for, car is 99 Boxster TipTronics, Thank You.

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- Break in wiring

- Short to Ground (GND)

Wiring from MAF to ECM.

Has anyone been inside the engine compartment recently doing anything?

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Thanks for the reply, I had the code for a while (year or so), I replaced the MAF a year ago, i had no codes for a week then back again, I also replaced Air/Oil separator, Oil fill tube and oil stick tube. i just cant get rid of this code, I had a 02 sensor Bank2 code, ordered the 02 sensor and got it today but check the code and was P0102, how can i check for Short to Ground (GND)? when i clear the code it comes back on after 2 or 3 miles of driving. i drive the car less than 4K a year so i finally decide to fix the problem.

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