1999 BMW 318 ti
Problem for BMW 1999 318 ti

Bmw E46 318i touring. fail code 171




By jshortiss on Jun 28, 2008

" "
i took my bmw to the deelers and they diagnosed the car as having a faulty mass airflow sensor. i have replaced the sensor and now i have a code of 121. this second code occures after only 35 miles each time i cancel code, but before i replaced the mass airflow sensor it would ocure after about 100 miles each time i canceled it. have i done something wrong when inserting the new mass air flow sensor?

Same Problem

Apr 02, 2009

-   my car have problem fail code 171/P0170,Change everything including valve fuel filter,fuel pump and check all intake no leak but after reset the fail code the problem still same engine light on. please help.-   nikgha

Solution #1

posted on Jul 11, 2009
Somewhat Helpful)

bnachos

Rank: Master 
Rating: 84%, 14 votes
171 check, fuel supply system short circuit to b+
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