MAF check engine light

[scoobopdan]

Long story short - had a cold air intake on my 08 yaris for 4 years. Had to restart the battery when I first installed it and it had no issue relearning. Had an oil change 3 weeks ago and had the mechanic put on a new filter while it was lifted. He didnt put it on all the way and it fell off, but I caught it after a few miles. Put it on correctly, cleaned the MAF, and reset the computer. Now the MAF is throwing a check engine light randomly but will turn off after the car being off for a while. It's done this 3 times. It always trips while on the highway going up hill. Should I get a new sensor? Any idea what could be causing this?

[WeeYari]

Make sure the MAF is seated correctly and you haven't damaged the o-ring.

[scoobopdan]

By o-ring do you mean essentially a gasket between the sensor and intake?

I should note that the idle and gas mileage haven't changed and I can't hear any interruptions in the engine noise, even when the light trips.

[B.B._07]

What is the code? There's more then one MAF related check engine code. MAF sensor's (especially OE quality ones) can get quite pricey so I wouldn't go buying a new one unless you're certain it's the problem.

[komichal]

Did you clean the MAF with proper MAF cleaner spray?

[scoobopdan]

I did clean it with proper MAF cleaner. The exact code is P0101. How would I know if it wasn't seated properly? It seemed to reinstall after the cleaning like normal.

[scoobopdan]

I reset the computer, really cleaned the MAF again and let sit for a longer time to dry, and let it idle for a good 10 minutes after the reset. So far no check engine light, will keep posted.

[bronsin]

I got a rebuild maf From Napa about eight years ago for $80 for my sons 2000 and echo. Same part on the Yaris. It still works so if you need a new one no biggie.