Codes 171,420, and 442

2002 3.4L 5 speed with 40,000 miles/60,000KM, I just bought it a couple of months ago, it has been dealer serviced since new. What are the possible choices for these 3 codes, and are they likely all connected to one issue, like say an O2 sensor?

Thanks,

Don

 

usually the scanner will tell you... how did you pull the codes? most auto parts stores have a scanner that will list problem with code at no charge

 

Sorry, I should have explained I knew what the codes are, but I am wondering if say a bad 02 sensor would cause all 3 codes to appear? Or the first 2?

Thanks for the replies so far.

Thanks,

Don

 

Did you replace the O2 sensor? Did it fix the OBD codes?