P0141 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 2
P0142 - Heated Oxygen Sensor (HO2S) Circuit Bank 1 Sensor 3
.... As for mileage, I agree with ventureowner, specially if it is city driving, even in part..but if the code keeps the engine computer in open loop, it may have also an impact...
...notice that 141 is about the O2
heater circuit..check if you have 12V feed at ....pink and black.. of the sensor plug
don't know why they label "sensor 2" and "sensor 3"...?? there are more than 2 dozen codes for O2 sensors, some for bank 1, bank 2....and sensors 1,2,3 in each bank....that is more than we need..
