I have a 99 f150 4.6L 2 wheel. Code po141-Bank 1 Sensor 2 ---which rear sensor is this??

 

Bank 1 is Passenger side. sensor 2 is after cat. what is the code. the after cat sensor for the most part do not affect engine management. they are there to report on the cat

 

Thanks for the quick response! Again--the code was PO 141

 

my bad I did not see the code # earlier. " sensor heater circuit" you should check the connections on it but my guess is that it is bad. Again the after cat sensor are really just for reading info for the cat not managing the engine( I know some people will argue with me about this)
That code is for the heating elemnt of the sensor

 

yes, the second sensor is to report on the cat. it takes info from the front sensors, compares them with the rears, and determines if the cat is functioning properly. the fronts control the fuel mixture.