MAF Location

[wasnt]

I have a 2015 Genesis 5.0 sedan. Does anyone know where the MAF (Mass Air Flow) sensor is? I couldn't find it in the service manuals either.

 

[Tau]

I can't find the exact location via an online search but it should be between where the air intake snorkels merge and the throttle body which is forward and center beneath the large plastic beauty cover. It could be on the bottom side of the center tube leading into the throttle body

 

[wasnt]

I found reference to the part in the attached page from the repair manual, but the manual has no other information throughout the entire book on the MAF.

 

[Tau]

The diagram looks like it's mounted on the topside of the tube connected to the throttle body entrance. I don't have a 5.0 to reference, but when you remove the V8 beauty cover, can you see it mounted on that tube?

 

[wasnt]

The diagram looks like it's mounted on the topside of the tube connected to the throttle body entrance. I don't have a 5.0 to reference, but when you remove the V8 beauty cover, can you see it mounted on that tube?

I don't see it there either. Here are some pictures...

 

[Tau]

Any way to see beneath the cover on the left in the photo below? It looks like the air intake tube runs beneath it but I can't tell if there's a way to remove that whole plastic piece between the two red bands. The MAF should be in that center tube.

 

[Tau]

Found this video which shows that piece between the red bands is an air box but no indication of where the MAF is located.

Is there anything between the center air box and the two air filter boxes? Maybe a dealer shop or parts dept. will be of help.

 

[carguy75]

The 5.0 engine does not have an MAF sensor. It only uses a MAP sensor located on the upper intake manifold.

 

[Amgil]

I have a 2015 Genesis 5.0 sedan. Does anyone know where the MAF (Mass Air Flow) sensor is? I couldn't find it in the service manuals either.

The 5.0 has a MAP sensor. It is on the back of the intake manifold and can only be removed taking by off the intake manifold. There is a wire harness that cannot be removed in the Way of the sensor, and a bolt on the housing of the sensor hugged right against the fireway. Trust me, don’t even bother trying, this took me all day to get the manifold off when i cleaned my valves.



I seen your other thread. So unless you’re ABSOLUTELY certain that the MAP sensor is the culprit, don’t bother. You can however take off the air intake pipes right before the throttle body and maaaaybe spray some MAP cleaner to the back of the inside of the manifold to clean the sensor.

Keep in mind, just because you dont have a check engine light doesn’t mean your vehicle isn’t possibly misfiring. The computer has a certain threshold of misfires during an elapsed time before it will throw a code, and if it isn’t misfiring more then that threshold it wont throw the code.

If cleaning the map doesn’t fix your issue, its either spark related (plugs/coils) fuel related (injectors/ fuel pump)or mechanical like your transmission.

Start diagnosing the cheap and most likely things first.
Cleaning the MAP > spark plugs > checking ignition coils etc. I suggest trying what someone else said in your other thread about some fuel cleaner, that could possibly fix it (although i doubt it).

If you know someone with a fancy scan tool you can watch live data on each cylinder too see if there is any misfires, check fuel pressure etc. Could even be your intake valves are caked in carbon deposits. (This was the problem for me, cleaning them solved it).

 

[wasnt]

Thanks so much for the details @Amgil! I appreciate it. I am still experiencing some hesitation that I will have to dig into I guess (spark plugs helped but not completely).

Recent Work

• Changed out all plugs to NGK Iridium iX (gapped correctly)
• Replaced both air filters
• Ran through a tank of gas with 93 octane & a bottle of Techron
• Changed front brakes

______________________________

Help support this site so it can continue supporting you!

 

[wasnt]

I do want to add that I found it odd that a MAF Sensor is called out in the service manual (see screen shot in thread above).

 

[carguy75]

I do want to add that I found it odd that a MAF Sensor is called out in the service manual (see screen shot in thread above).

I have the service manual and it makes no reference to a MAF sensor; only MAP sensor. That screen shot is not for a 5.0 Tau engine.

 

[Amgil]

Thanks so much for the details @Amgil! I appreciate it. I am still experiencing some hesitation that I will have to dig into I guess (spark plugs helped but not completely).

Recent Work

• Changed out all plugs to NGK Iridium iX (gapped correctly)
• Replaced both air filters
• Ran through a tank of gas with 93 octane & a bottle of Techron
• Changed front brakes

Can you feel the engine jerk/hesitate when its idling in park or when its in drive but your not moving? That can help narrow down if its a transmission problem or if it’s coils or something fuel related like injectors etc.

 

[wasnt]

Can you feel the engine jerk/hesitate when its idling in park or when its in drive but your not moving? That can help narrow down if its a transmission problem or if it’s coils or something fuel related like injectors etc.

It only happens during low speed acceleration, never at idle. And it's not even consistent as it only happens about 30-40% of the time. It doesn't feel like a transmission issue. I had an issue that was very similar in my old Mazdaspeed 6. Multiple trips to the dealer and nothing. No CEL either, just like with this issue. It ended up being the o2 sensor.

 

[wasnt]

I have the service manual and it makes no reference to a MAF sensor; only MAP sensor. That screen shot is not for a 5.0 Tau engine.

I got the Service Manual from the links someone provided in another thread. Is this not the right one (downloaded the file '2015 - 5.0 GDI.zip')?

Hyundai Genesis - Google Drive

drive.google.com

 

[carguy75]

I got the Service Manual from the links someone provided in another thread. Is this not the right one (downloaded the file '2015 - 5.0 GDI.zip')?

Hyundai Genesis - Google Drive

drive.google.com

I will not open one of those files. The service manual that I have does not include any information about a MAF sensor on a 2015 Genesis 5.0 V8 engine.

 

[princelybug]

@Amgil l and @carguy75 are correct. The 5.0L Tau V8 has a MAP sensor. I paid my indy to replace it with an unshrouded version:

https://www.amazon.com/Facet-Manifold-Absolute-Pressure-10-3180/dp/B01M8QW5KD

Thread here:

Unshrouded MAP sensors for better response

An old import speed hack is to cut away the rubber / plastic covering from the temp probe section of the MAP sensor to let it react quicker to intake air temp changes. The stock sensor, like on nearly every car in the past couple of decades, has the thermistor sealed inside rubber or plastic...

genesisowners.com