o2 sensor

[dans99]

well i feel like a dumb ass!!!...I scanned it again. it was a P0141 so its the sensor on the passenger side after the cat (bank 1 sensor 2) So ill be replacing that one this week. Would it be a good idea to replace both sides? again sorry for dropping the ball on which code it was. lol

 

[SunlitComet]

It is actually the same sensor. One code is for reliability of measurements and the other is for reliability of heater circuit within that sensor. they are both for left cylinder head after converter. In fact the heater fualt can cause the measurement fault. In either case chuck it. And just wait till bank 2 pops a code first. I believe it will last much longer.

 

[Danny_Z56]

Danny...I noticed to that mine stays at 1000rpm's on a cold day on a cold start. its just so it can warm up faster, but like you said it goes back to normal once up and running.

Yeah i know when starting the motor the PCM will have the RPM's up higher as part of the warm up program.

What i was refering to is,Even after the motor is warm and i have drove for a good distance,park the vehicle and put it into 'Park',my Idle will still be running 1000RPM.If its like 35* or higher out,my RPM's will be @ around 6-700 RPM's.

My temp gauge will read slightly under the 1/4 mark.

During the warm months my temp gauge will normally read at the 1/4 mark.

 

[dans99]

"It is actually the same sensor. One code is for reliability of measurements and the other is for reliability of heater circuit within that sensor. they are both for left cylinder head after converter. In fact the heater fualt can cause the measurement fault.".....

I dident know that.....Thanks for giving such detailed info and explaining everything....Thanks

 

[SunlitComet]

Yeah i know when starting the motor the PCM will have the RPM's up higher as part of the warm up program.

What i was refering to is,Even after the motor is warm and i have drove for a good distance,park the vehicle and put it into 'Park',my Idle will still be running 1000RPM.If its like 35* or higher out,my RPM's will be @ around 6-700 RPM's.

My temp gauge will read slightly under the 1/4 mark.

During the warm months my temp gauge will normally read at the 1/4 mark.

That still seems a little low, your gauge in the summer months. Maybe I am wrong.

The high idle even after a warm engine is also infuenced by a combination of MAF, IAT and Baro sensors at cold temps.

 

[SFM Doug]

What are the bosch part numbers for all the o2 sensors i need for a OBS 99 4 door 4wd tahoe 5.7?

 

[OR VietVet]

Bosch 4L60E trans
Upstream #15703
Downstream #13474

4L80E trans
Upstream #13027
Downstream-Same as 4L60E trans

 

[SunlitComet]

What are the bosch part numbers for all the o2 sensors i need for a OBS 99 4 door 4wd tahoe 5.7?

Use delphi or delco only. DO NOT USE BOSCH.