code 3 on eagle talon (don't understand)PLz help

I have a engine light problem, i went to autozone and had it checked it say PO170

The PCM has determined that during testin, the fuel compensation value for bank 1 exceeded the specified range. (Bank 1 identifies the location of cylinder 1, while bank 2 identifies the cylinders on the opposite bank.

I went looking for some answer online and found a forum about it, but was left unanswer, they were talking about some coolant temp sensor, the one going into the ECU. also it could be a 02 sensor, not sure which one it is yet, but i would like some second opinion on this.

also anyone know how to change the coolant sensor the one going to the ecu.

Thank you for all your help on this one.

http://www.automotiveforums.com/vbulletin/showthread.php?t=672701

Read post #5. I'd change the o2 sensor.