P2195, P0171 & P0172 codes

[Quagmark]

I'm getting 3 codes,
P0171 - system too lean
P0172 - system too rich
P2195 - O2 sensor stuck

Any ideas on where to start? I don't want to just run out and buy an O2 sensor because it seems like most times that's not the actual problem. Any help on troubleshooting this is much appreciated.

Thanks,
Mark

 

[lga30707]

Same three codes came up on my '03 XLT, hope someone can answer. Trac is running very rough right now.

Thanks!

 

[Quagmark]

On mine it ended being a loose wire on the O2 sensor. I had some transmission work done and apparently the wire got knocked loose when they were down there. I'd say look under there and make sure the wires are tight and if they are you may want to look into replacing the sensor.

Mark

 

[lga30707]

Codes

Thanks for the info, it is easier to "armed" with this info before going to the repair shop.