I have a 03 Accord my check engine light came on and I just scanned the car and came up with a code p0141 oxygen censor B1S2 or post cat sensor failure. Anyone know if this is a problem aside from the fact that I would fail emissions? How much difficulty is it to change the sensor or how much is it going to cost to fix it?

Thanks

 

quoted directally from December 2005 Service News
"Got a ’03 Accord L4 in your shop with the MIL on
and DTC P0141 [secondary HO2S (sensor 2)
heater circuit] set? Check for poor connections or
wire damage to the heater circuit. If the circuit is
OK, then replace the secondary O2 sensor, and
clear the DTC.
The sensor may have gotten damaged from
internal corrosion to the sensor heater. You’ll most
likely run into this problem if your service
customer lives or works in one of the salt belt
states. The replacement sensors in Honda parts
stock have been updated to prevent this problem."
And yes this will cause you to fail emissions.

 

there is a good chance that it might be under warranty,, call your local dealer and find out..