P0161 Oxygen sensor code
02-08-2016, 10:42 AM
#1
P0161 Oxygen sensor code I've got an 04 CTS-V that I bought maggied. I sold the maggie off and returned the car to stock (right down to the cats/manifolds and airbox) but now I'm getting a p0161 code.
I've researched it and found that it could be the PCM, the cat or the o2 sensor itself.
From what I can tell, the down stream o2 sensors are supplied with a source voltage designed to heat the sensor up (i think) so I want to check this voltage to make sure the PCM is sending it and that the sensor is receiving it. Anybody know what kind of voltage I should be seeing at the sensor and how I should be metering it???
Also, the sensor isn't coming out without a fight so I thought maybe I could check the resistance on it to see if its still good or not before spending $60 on a replacement. Can you check an o2 sensor this way and if so, what kind of resistance would I be looking for?
If its getting the correct voltage and the sensor has the right range of resistance, would a bad cat throw a code like this or would it typically throw something else?
Thanks for any help.
I've researched it and found that it could be the PCM, the cat or the o2 sensor itself.
From what I can tell, the down stream o2 sensors are supplied with a source voltage designed to heat the sensor up (i think) so I want to check this voltage to make sure the PCM is sending it and that the sensor is receiving it. Anybody know what kind of voltage I should be seeing at the sensor and how I should be metering it???
Also, the sensor isn't coming out without a fight so I thought maybe I could check the resistance on it to see if its still good or not before spending $60 on a replacement. Can you check an o2 sensor this way and if so, what kind of resistance would I be looking for?
If its getting the correct voltage and the sensor has the right range of resistance, would a bad cat throw a code like this or would it typically throw something else?
Thanks for any help.
