Any help appreciated...my check engine light came on on my 2002 Mazda Protege5. I went to my dealer and paid them to run the diagnostic, which they tell me came back saying that the P0031 HO2s11 Heated 02 Sensor had a malfuntion.
They are telling me that a new sensor will cost 234.40 and 50.00 labour to install. I figure these sensors are not too difficult to install myself and that I can likely get one at local autoparts store much cheaper (I see them online for 50$). Can anyone tell me if this is something I should attempt to do myself, how difficult is it, anything special I should know about before attempting and where the heck do I find this sensor (the Mazda service guy suggested that there are a few of these)?
Thanks, Mike