Mass air flow sensor?

DGRS4LYF

MEMBER
2007 GMC SIERRA
4.8L
V8
2WD
AUTOMATIC
175,700 MILES

Check engine and traction control lights came on and my truck would “jump into 2nd gear. Air intake code came up so I replaced mass airflow sensor. Truck no longer jumped but check engine and traction control lights stayed on. New code says it’s the air intake temperature sensor. Truck runs fine. Just the check engine and traction control lights are still on as well as air temperature code. I got the MAF from O'reilly auto parts and went for the cheapest one. Could it hopefully just be cheap parts or something more sinister? I’m not a mechanic but replacing MAF is simple enough to do myself. Thanks.

Saturday, February 20th, 2021 AT 9:53 AM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
51,582 POSTS

It sounds like the sensor is no good because the air temperature sensor is inside the MAF sensor. I would make sure it is installed correctly and if so get an ACDelco unit from Amazon or Rock Auto. Check out the diagrams (below). Please let us know what happens.

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Sunday, February 21st, 2021 AT 10:12 AM

DGRS4LYF

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4 POSTS

Thank you! Going to order the whole unit now. Fingers crossed that will fix check engine and traction control lights.

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Sunday, February 21st, 2021 AT 4:28 PM

KEN L

MASTER CERTIFIED MECHANIC
51,582 POSTS

Please let us know.

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Thursday, February 25th, 2021 AT 8:04 AM

DGRS4LYF

MEMBER
4 POSTS

Thank you! I put in MAF myself, with my 13 speed KW mechanic watching me, and all lights back to normal. Thank you! Best to buy the correct part/manufacturers item than going cheap route.

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Friday, March 5th, 2021 AT 12:44 PM