CEL OBDI. 02 sensors?

RJayLo · Jun 6, 2008

Latley the CEL has been coming on and staying on for longer and longer. Im not sure what the problem is though. I have started by changing fuel filter and IAC. I recently bought new o2 sensors but may have gotten wrong ones (since Autozone insists I have 4 and they are different ranges). I picked up an OBDI scanner yesterday and pulled these codes:

172, 176, 181, 189

Basically all telling me I am lean. I can smell fuel on occasion also. I cant say for sure that the car has been drastically affected, but I want to find the problem.
While driving, the CEL will come on and stay for an amount of time and then when I get to a slower roll or stop, it will shut off. On occasion, the car wont stay idling. I have to hold the accelerator down a little to maintain it. That doesnt happen all the time, but often enough to know something is going on.

My thoughts are to clean the MAF sensor, but I also would like to get a part number from you guys on the exact 02 sensors I need. I COULD have picked up the wrong ones?
any thoughts?

CC'S95GT · Jun 6, 2008

yup clean the maf first then reset the computer that should clear up the cel mine was doing the same thing do you have a k&n filter or similar. the oil in the filters have been known to stick to the maf. now I have a stock paper filter, no more cel either. doesn't really sound like o2's to me

RJayLo · Jun 6, 2008

I recently (like last week) put in a K&N filter. I wouldnt doubt the oils have contributed to the problem, but these issues have been happening before also.
I picked this car up at 150xxx miles and it really doesnt look like it has ever been modded so I feel pretty confident in saying the MAF has never been cleaned, among other items...

After doing some research, maybe I didnt change the IAC. I replaced a sensor on the intake arm just behind the MAF. According to some pics the IAC should be on the TB? What did I replace?