Check Engine Light!!!!!

[aemaxin]

Hey, I have an '01 AE and my Check Engine Light popped on so I went to get it checked and it was the Mass Air Flow code but didn't know if it was the sensor or not so is was cleared. Today it popped back on. The car isn't really running any differently. Need Help!!!!!!!!!!!!!!!

[danielekfuj]

could be a bad connection to the MAF sensor. You might wanna check that out

[Beancooker]

Sensor could be failing. I have read a few posts at another Nissan forum about a few people who have a MAF that fails slowly, and they never notice the loss of power, until it completely fails. Then when it is replaced, it feels like a different car. Could be a bad connection like danielekfuj said, or possibly the element inside the MAF is disconnecting.

[aemaxin]

Thanx for the feedback guys. Yesterday I had the filter changed cuz i let the oil change guys put a crap *** filter in there and their was a small gap letting air and dirt get by to the sensor but the light came back on later in the day. i haven't really messed with the car much...... what all do i need to do to check the connections........and if it is the sensor, if i buy one from an auto parts store, do they have to be programmed? I've heard horror stories!!!!!O yeeah, any suggestions on which one would be better or are they all about the same????

Thanx

[nismopc]

........and if it is the sensor, if i buy one from an auto parts store, do they have to be programmed? I've heard horror stories!!!!!

MAF sensor is a dealer only part. When you replace it, you should be fine just resetting the ECU yourself. On the 5th gens ('00-'01), you should be able to disconnect the battery for an extended period and the ECU will reset.

I have a 5.5 gen and when I replaced mine, I ran through the whole ECU reset process (different than 5th gens). I still had a hesitation around 2500-3000 and ended up having the dealer flash my ECU with an update. It was part of a TSB and cured the hesitation.

[aemaxin]

Ok, thanks guys!!!!