Mass Air Flow Cleaned, now transmission won't shift?


Asked by Apr 27, 2017 at 08:20 AM about the 2000 Chevrolet Impala LS

Question type: Maintenance & Repair

So my MAF was very dirty when removed. I used appropriate cleaner and let
it dry for about an hour. I reinstalled the MAF and took it for a drive. My
check engine light came on, and it will not shift out of first gear. I read
somewhere that is the MAF was cleaned you must reset the vehicle's
computers so last night I unhooked my battery and let it sit overnight. I don't
know if it will work correctly or not, but is there a specific set of instructions I
have to follow to reset the parameters of the vehicle's computers? I heard
that I need to perform the GM Driving Cycle. Any thoughts? Anything is
much appreciated. I also read somewhere that the MAF calculates engine
load so the transmission knows when to shift because of line pressure.

10 Answers


** I understand how delicate the Mass Air Flow sensor is so I made extra sure not the let anything even get so close as to touching it or the hot wires. I even had the spray can back quite a ways so it wouldn't be too much pressure on the hot wires.**

1 of 1 people found this helpful.

Is the check engine light lit? If so have the trouble code read.

1 of 1 people found this helpful.

Yes there is a drive time protocol for your vehicle, it can take as long as 20 minutes for it too relearn the vehicle, however there is a basic programming installed from the factory, so even during the drive time everything like the transmission should work as it would right from the factory, so if it doesn't shift then something else is wrong, double check your work, possible a cable got misrouted or sensor ground wire could have broke, sometimes it just a little thing that can really mess us up. If all else fails find a shop close by that can do a live data scan, that might be the only way to find what happened.

1 of 1 people found this helpful.
Best Answer Mark helpful

The check engine light is on, but I'm not sure what it is yet. I'm going to try and see later what it is. I believe it is still receiving power, but you might be correct with the wire being not routed correctly or a ground wire breaking. Thanks!


I am almost positive though that the code is going to be a P0101.


If you still get the MAF code thats for sensor range, then it's time for a new MAF.

1 of 1 people found this helpful.

Thanks for the best answer points.

1 of 1 people found this helpful.

No problem! Thanks for your help!


***SOLVED*** I figured it out! I accidentally put the throttle position sensor in wrong and it now runs and drives better than ever before! Thanks for your help!


WOW I didn't think you could put those on wrong, I've never had a problem with that but I always mark everything first, just been a tech too long. Glad you found it and hope you are code free.

Your Answer


Looking for a Used Impala in your area?

CarGurus has 27,000 nationwide Impala listings starting at $1,000.


Chevrolet Impala Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Malibu
604 Great Deals out of 48,316 listings starting at $1,800
Used Honda Accord
529 Great Deals out of 93,656 listings starting at $1,495
Used Chevrolet Camaro
243 Great Deals out of 29,880 listings starting at $4,980
Used Nissan Maxima
235 Great Deals out of 17,856 listings starting at $1,995
Used Toyota Camry
787 Great Deals out of 71,592 listings starting at $175
Used Nissan Altima
749 Great Deals out of 67,282 listings starting at $750
Used Chevrolet Silverado 1500
2,183 Great Deals out of 150,273 listings starting at $1,499
Used Chevrolet Tahoe
626 Great Deals out of 37,207 listings starting at $795
Used Ford Mustang
288 Great Deals out of 38,306 listings starting at $1,995
Used Ford Taurus
146 Great Deals out of 15,593 listings starting at $1,900

Used Cars For Sale

2018 Chevrolet Impala LS For Sale
1,110 listings starting at $18,321
2017 Chevrolet Impala LS For Sale
7 Great Deals out of 643 listings starting at $14,289
2016 Chevrolet Impala LS For Sale
194 listings starting at $11,500
2015 Chevrolet Impala LS For Sale
6 Great Deals out of 220 listings starting at $10,979
2014 Chevrolet Impala LS For Sale
3 Great Deals out of 206 listings starting at $9,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.