MAF - o2 sensors

[bigsho]

I replaced my o2 sensors less than a month ago. Last week I get a CE light. Go to ford and pull the codes. I lean. I told him I just replaced the sensors. He unhooks the MAF and the car runs the same with it plug in as it does unplug. Could that be a reason I'm running lean. Please help. Also replaced the T-stat and sending unit with in the past 2 months.

 

[CTOESHO]

My 02's were replaced with OEM ones when I installed my PP Y-Pipe. My CE light came on also and it told me that my rear O2 was running lean or rich also (don't remember which). The CE came on like a month after I replaced them. I don't know whats wrong but I was just going to replace it. If you find something out please let me know. Thanks.

 

[luigisho]

That could be the source. Did you drive with it unplugged to compare performance? Try some electrical contact cleaner spray on the electrodes hanging inside the MAF to see if it helps.