My BMW needed a oil change so my bf did so...
after we turned car on the check engine light came
on. hooked it up and said system too lean bank 1
and system too lean bank 2. my bf cleaned the
mass air flow (MAF) sensor and now my awd and
dsc are malfunctioning. havent hooked it back up
but thats what the dash says.
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2009 BMW 5 Series
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