please i want to know what mean the code p0102 on 2006 BMW 325i

i just wanna know about the code and thanks for that

3 answers
MAF sensor low input voltage (air flow). Try to clean it and replace and see if this resolves the problem. Otherwise, probably need new one.
Mass or Volume Air Flow Circuit Low Input
the code p0102 means there is a problem with the Mass Air Flow (MAF) sensor or circuit.