Searles945

My O2 sensor finally comes in the mail and I think I got it on the car faster than I got it outta the box j/k lol, but seriously, it wasn't a hard install and all seemed to be fine, cleared the CEL and put a smile on my face ....until about 30 miles later , the frikkin light came back on!!!!, so now I'm curious??, what else could be the problem??

Searles945

No one knows anything??!!

Debonair

Are you sure there are no other codes in the system?

P0161 will come up when the heater current for B2S2 O2 Sensor is over 2 amps OR under 0.2 amps while in operation.

It could be the O2 Sensor or the O2 Sensor circuit (wiring).

Searles945

Im sure, thats the only code, is there any way I can the sensor tested?? or could the fuse for the OBD be going bad (this was recommended by the receipt from the CEL read) but I figured if the OBD fuse (on board diagnosis) was out, the CEL wouldnt have come back on because the OBD wouldnt have caught it again....could this be true??

GS300ToM

iTrader: (32)

the o2 can be bad as well even tho its new...

Debonair

If there is a OBD fuse and it is out your scan tool would not communicate with the vehicle. O2 Sensors can definitely be tested. As with all repair information I provide USE IT AT YOUR OWN RISK.

B+ to HT - Resistance should be 11-17 ohms.

B+ to Ground:
KOEO - should read the battery voltage
KOER - should read the system charging voltage

HT to Ground
KOEO - should read the battery voltage
KOER - should read around 0 volts when turned on by ECM (If not possible bad wiring to ECM). It also could read between 0 and charging voltage if the ECM has it in Duity Cycle Control.

FYI:
KOEO =Key On Engine Off
KOER = Key On Engine Running

Searles945

Well, I found out the O2 sensor was good, but the new CEL is because of a p0420 code....

Debonair

GS300ToM

iTrader: (32)

hahaha!!!!!!!!

Searles945

P0161 was the only code, the original O2 sensor in bank 2 was bad. Due to the replacement, its showing the new code because its getting readings from that area. Please know the whole story before being a douche

Debonair

Ok. Good Luck.

bye bye

Searles945

Hey, no hard feelings but unnecessary responses get unnecessary answers, thanks for the luck,i'll need it....

pwesseler

I don't mean to bump this post, but you made me laugh and spit my water out.

Debonair

Forgive me if I am old school in this regard but if someone who DOES NOT HAVE TO goes out of their way to assist you with YOUR issue you don't come back and call them a "douche," you say THANK YOU. At least that's how i was raised.

The "whole story" to people on this forum is only what you tell us. I asked "Are you sure there are no other codes in the system?" to which you replied "im sure, thats the only code" and then later, presumably after actually checking the codes, replied "the new CEL is because of a p0420..."

I tried to help you, you appeared to have assumed there were no other codes, and now I'm a douche. Riiiiiight. I don't hold grudges but I do remember which people are appreciative and which are not.

Even though you did not feel the need to thank the only person beside GS300ToM to reply to your request for help including information on how to test your O2, and actually called that person (me) a douche, I will say Your Welcome.

AsGs300

Not cool Searles...