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mass airflow sensor
10-14-2011, 05:01 PM (This post was last modified: 10-14-2011 05:08 PM by dmac145.)
Post: #1
mass airflow sensor
I have a 2003 Impala that has a maf sensor causing my check engine light to come on.I had a mechanic scan it earlier and he found it wasn't getting power to it. He found the fuse and replaced it. Then found the sensor to be bad and replaced that. Now my light is back on. I replaced the sensor with no success. Can anyone tell me what fuse it is on? I no longer live in the area of that mechanic so I can't just go ask him. Thanks
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10-14-2011, 09:11 PM (This post was last modified: 10-14-2011 09:12 PM by Rupe.)
Post: #2
RE: mass airflow sensor
Going by memory the MAF gets power from the ECM and most GM cars have 2 fuses marked ECM.

OTOH, you should also take a trip by your local parts store and ask them to do another scan just in case it's not the MAF again. (guessing it's probably not) Now, another thing to look at is the fact that you could get a check engine light if the air cleaner was not reinstalled properly. IOW, a leak by the air filter can make the MAF dirty and that will throw you a code. If you do find a leak / poor seal you can clean the MAF with brake parts cleaner and (more carefully) put things back together.

If they do find more codes then jot them down to post here and have them cleared so anything that comes back will be up to date instead of old history.

Let us know what you find.
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