The codes are in the Powertrain manual, not the service manual. The way the sensors are numbered are bank 1 for the bank that has #1 cylinder (only one on PTs) and then sensor 1 for the first one the exhaust hits, sensor 2 for the second. This means the code is for the "downstream" O2 sensor. The relay is used to supply power to the heater circuit, so, I'd guess that this circuit had the problem. I'd suggest opening the hood and using the lid to find which relay is for the 1/2 sensor heater. Take it out and check the terminals. Clean as necessary, and put it back tightly. The code will stay in history (the memory used to help fix intermittent problems) for 40-50 starts. Don't clear the memory, just see if the light goes out. Good luck.
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2004 Dark Plum Base with windows tinted, cabin filter, silencers removed, fog lights, 18\'s, all Red taillights, Blaine\'s struts, modesty cover, color-matched center dash, 06 rear bumper
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