need help i keep getting this fault p0102

[tone01]

hi every one i'm having this error code p0102 it say low circut maf. i changed the maf twice, check for bad ground everything good, check if there were any breaks in wires with omh meter no breaks /does any one have any advice what the next step would be. i used the scan tool and the reading on the maf at idle are around 3.5 grams is that normal one guy i talk to said it should be around 18-20 at idle. any help would be great i'm really stomped. thanks every one

[Loren]

Model and year of your car please?

[tone01]

oh sorry its a 03 996tt

[Loren]

P0102 Mass air flow sensor – below limit

Possible fault cause

- Open circuit

- Short circuit to ground

- Mass air flow sensor faulty

Is your PSM light on too?

Do your brake lights work?

[tone01]

yes my psm and abs lights are on too it has a rough idle in the low rpm range. the signal off the maf the blue/white wire. i checked it at idle its 1.2 volts and at full open throtle it goes up to 1.8-to 2.0-2.1 around there. i checked all data it says at full open it's should go down in volts around .9 volts or so.is that correct brake lights work . i'm on my third maf

Edited September 19, 2009 by tone01

[DTW_JWA]

I have the same issue. I noticed the warming lamps and the p-code after I had the battery fail. I used the fuse box front decklid jump post to get to the battery. I recharged the battery for most of the day and it has a voltage of 12.4 when idle. The lamps come on, when I pause at the light, but the vehicle runs great.