P0171 - System Too Lean (Bank 1) After MAF CLeaning

[Jakeepoo3]

Did you watch the video on the link??

 

[repo]

I replace the MAF o-ring after a few cleanings as insurance, or if it looks jacked up. Dunno if an old one would cause a vac leak but the part # 90099-14141

 

[Yung_Ji]

Quick update guys,

Went to a mechanic to get it smoke tested for vacuum leaks and we were not able to find any.

My Denso MAF Sensor arrived and I replaced it and reset the ECU. I took it for about a 30 mile drive mostly freeway to recreate the high RPM acceleration scenario which triggered the P0171 code. I had my OBD Scanner feeding live data and it looks promising. Short and long term fuel trims never exceeded +5.5% even at 2500+ RPM accelerating on to the freeway. Engine feels much more responsive at acceleration at higher speeds as well. MAF reads around a nice 3.43 g/s at idle.

I hope this was the fix and I am out of the woods. I will check in for another update after 100-150 miles or so! Wish me luck guys and thanks for being an amazing and supportive community!

 

[wrench.n.wheel]

Quick update guys,

Went to a mechanic to get it smoke tested for vacuum leaks and we were not able to find any.

My Denso MAF Sensor arrived and I replaced it and reset the ECU. I took it for about a 30 mile drive mostly freeway to recreate the high RPM acceleration scenario which triggered the P0171 code. I had my OBD Scanner feeding live data and it looks promising. Short and long term fuel trims never exceeded +5.5% even at 2500+ RPM accelerating on to the freeway. Engine feels much more responsive at acceleration at higher speeds as well. MAF reads around a nice 3.43 g/s at idle.

I hope this was the fix and I am out of the woods. I will check in for another update after 100-150 miles or so! Wish me luck guys and thanks for being an amazing and supportive community!

Do you have the part number for the sensor and what year is your rig?