Pulled code 0161 from my reader. "downstream heated O2 sensor heater circuit
My question is: does this mean that the O2 sensor has failed or the circuit
powering it has failed. The code is intermittant cuz I can reset it and it
sometimes does not come back for a while and I see no affect with engine
performance when the ses light is on.
Does anyone have prior experience with this code so I don't go changing
something that doesn't need changing?