Diagnostics Code P102? Has my MAF Sensor Gone Bad?
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TECH Apprentice
Joined: Sep 2002
Posts: 319
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From: Kentucky
Diagnostics Code P102? Has my MAF Sensor Gone Bad? My car lately had been missing really badly under 3K rpms. It seems to miss really bad when I try to take off from a stoplight. I originally figured that it was bad O2 sensors so I replaced both O2s. It seemed to help a little, but then it went back to the old tricks again. I have been throwing an SES light since this has been going on. I would reset the PCM and the SES light would stay off for no more than 3 seconds before appearing again.
Finally I broke down and had it diagnostically scanned today at Advance Auto Parts and Im throwing code P102. If I remember correctly its Mass Air Flow Sensor Low Voltage. So what Im asking is, would a bad MAF sensor do as I described above? My car is a 98 Trans Am A4 with 106,000 miles on it.
So before I break down and buy a new MAF, I want to know whether you think I need a new MAF, or something maybe wrong in the wiring, since it says low voltage. (I think thats the code description)
All help is much appreciated....
Thanks in Advance
Finally I broke down and had it diagnostically scanned today at Advance Auto Parts and Im throwing code P102. If I remember correctly its Mass Air Flow Sensor Low Voltage. So what Im asking is, would a bad MAF sensor do as I described above? My car is a 98 Trans Am A4 with 106,000 miles on it.
So before I break down and buy a new MAF, I want to know whether you think I need a new MAF, or something maybe wrong in the wiring, since it says low voltage. (I think thats the code description)
All help is much appreciated....
Thanks in Advance
TECH Addict
Joined: Nov 2001
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From: Live Oak, FL - in the woods where the creatures lurk.
Re: Diagnostics Code P102? Has my MAF Sensor Gone Bad? P0102 = MAF sensor circuit low frequency.
Is the ENG SEN fuse blown?
Is the MAF sensor getting a full 5V with ignition on?
You can disconnect the connector and check the voltage from the hot wire to ground with the ignition on.
I believe any non-metered air coming in or a vacuum leak will set the DTC,also.
That's all I can think of right now w/o digging out the Helms manual. I think there's a bunch of different checks that can be made if you can get your hands on a Helms.
Is the ENG SEN fuse blown?
Is the MAF sensor getting a full 5V with ignition on?
You can disconnect the connector and check the voltage from the hot wire to ground with the ignition on.
I believe any non-metered air coming in or a vacuum leak will set the DTC,also.
That's all I can think of right now w/o digging out the Helms manual. I think there's a bunch of different checks that can be made if you can get your hands on a Helms.
