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Originally Posted by stealth23
Do I check the voltage of the 02 sensor to determine a bad sensor ? and Ill try to switch the 2 sensors and see if the code changes. ill also check the exhaust pipes for any leaks.
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Yes. You'll probably want to look at the long- and short-term trim values, too. I'm sure others can suggest more params to look at.
If what you are using to read/clear DTCs will read the O2 sensors, use that. If it won't, you can find OBD/CAN monitors for $20 to what-ever-you-want-to-spend. If you're going to do you own maint/repair, it's an invaluable tool.