Oxygen Sensor Question

Hi, I have a 2001 Silverado 2WD 5.3 liter. My "Service Engine Soon" light came on. I had someone read it and it showed error code P0137. They said the voltage is low on the low bank 1 sensor 2. Does anyone know which sensor this is? A guy at the auto parts store said he thought it was the passenger's side before the cat. I changed it and still have the SES light on. I'm wondering if that wasn't the right sensor that I changed.

Does anyone know which sensor the P0137 refers to?

Thanks

With dual catalytic converters, bank 1, sensor 2 will be the post cat sensor for the drivers side exhaust, and you might want to watch the exhaust routing closely for crossing pipes

Hi, I have a 2001 Silverado 2WD 5.3 liter. My "Service Engine Soon" light came on. I had someone read it and it showed error code P0137. They said the voltage is low on the low bank 1 sensor 2. Does anyone know which sensor this is? A guy at the auto parts store said he thought it was the passenger's side before the cat. I changed it and still have the SES light on. I'm wondering if that wasn't the right sensor that I changed.

Does anyone know which sensor the P0137 refers to?

Thanks


these O2 SENSORS ARE TO BE REPLACED AT OR AROUND the 100,ooomi of useage...the manufacturers reommend this...If you do not replace them at this mileage you will need new cat converters,and also loose power and MPG>>>>

this sensor monitors the driverside cat converter performance...this could indicate a bad cat converter,,as well as other problems,,especially wiring/connectors/ground connections etc...

before buying new sensors if they are under the 100,ooomi of useage try swapping the sensor to see if the problem DTC changes location of failure .. this then will ensure you have the problem solved exactly..

if you have over the 100,ooomi life on these sensors ,,,replacement is recommend to prevent engine/cat converter damage...and pass the emissions testing ...

Thanks for the advice everyone. I changed out the sensor but my Service Engine Soon light is still on. Does anyone know if I need to reset this somehow or will it reset itself after a while. I'm hoping I don't have a short in a wire or something. Thanks again.

Ask Auto Zone or Advanced if they will erase the codes and recheck this is a free service.

Thanks for the advice everyone. I changed out the sensor but my Service Engine Soon light is still on. Does anyone know if I need to reset this somehow or will it reset itself after a while. I'm hoping I don't have a short in a wire or something. Thanks again.


disconnect the negative side battery connection for 10 min...this should reset the DTC trouble codes...

Thanks for the suggestions. I tried disconnecting the battery for 15 minutes but still get the code. I called Autozone but they said they said that California banned them from checking codes in 2005 because they are not a licensed smog facility. Does anyone have any other ideas or do I have to bite the bullet and take it in to a shop?

http://www.ntxtools.com/ Search Vendor list Innova Equus products. They just added this company.

It will go out WHEN the problem is corrected, usually after 5-10 drive cycles.

...I tried disconnecting the battery for 15 minutes but still get the code.

Disconnecting the battery might turn the SES light off. It will NOT clear the DTC's. DTC's remain in the history file until they are cleared with a scan tool, (not a code reader). The OBDII system is designed to keep DTC's in the history file in the event of battery failure so the technician is able to retrieve DTC's after battery power is restored. Have your system cleared with a scan tool and complete a drive cycle: http://www.obdii.com/drivecycle.html If the SES light comes back on, retrieve the DTC's and post them here. We can supply you with a flow chart to diagnose the problem.

these O2 SENSORS ARE TO BE REPLACED AT OR AROUND the 100,ooomi of useage...the manufacturers reommend this...If you do not replace them at this mileage you will need new cat converters,and also loose power and MPG>>>>

J, I'm wondering if you have stock in the 02 sensor business?:screwy: So I read thru my '98 C/K service manual and nowhere did it suggest or recommend changing O2 sensors at all. Maybe there is a TSB?

Got 150k on the '98 Sub 7.4 and still got great power and 14-15 mpg. And the original O2's (all 4 of them).

Thanks for the advice everyone. I changed out the sensor but my Service Engine Soon light is still on. Does anyone know if I need to reset this somehow or will it reset itself after a while. I'm hoping I don't have a short in a wire or something. Thanks again.

The P0137 code says to change the O2 sensor after checking for 7 different things.

Lean injectors, Fuel contamination, Fuel pressure, Exhaust leaks, Vacuum or crank ventilation leaks, Wiring issues to the sensor and/or VCM.

O2 sensors react to changes in fuel mixture. The faster they react, the faster the PCM/VCM can adjust the fuel mixture to keep it as close as possible to 14.7:1. They react both lean to rich and rich to lean. Normal driving will slow the O2 sensor reaction time down. It has been proven that after 100,000 miles the O2 sensor reaction time has slowed enough to significantly affect engine performance and fuel mileage.

J, I'm wondering if you have stock in the 02 sensor business?:screwy: So I read thru my '98 C/K service manual and nowhere did it suggest or recommend changing O2 sensors at all. Maybe there is a TSB?

Got 150k on the '98 Sub 7.4 and still got great power and 14-15 mpg. And the original O2's (all 4 of them).

you are absolutely correct,,,nowhere in any GM repair manual will you see this 100,ooomi replacement...the reason for this is GM wants all to believe at this mileage the vehicle life is ended...so why put this instruction in the repair /owner guide book///???


when I stated this 100,000mi limit ,,this is not my opinion....
this is the O2 sensor manufacturers....that is why it is hard for me to understand why owners insist on having the O2 sensors tested when OVER the 100,ooomi point..

why don't they replace one spark plug at a time when ever it starts missfiring ??or bring it in for a diagnostic scan to find the bad plug ?

owners screw around thinking their saving money by ignoring this life limit on these devices...in the end the engine runs poorly, uses more fuel, less power, more pollution , and the cat converter gets destroyed...


ITS THEIR VEHICLE AND THEY ARE THE ONE'S SUFERING FROM THEIR ACTIONS...OR SHOULD I SAY LACK OF ACTION ...

it also says if you do normal driving replace transmission fluid at 100,ooomi...and other stupid stuff..

Thanks for the suggestions. I tried disconnecting the battery for 15 minutes but still get the code. I called Autozone but they said they said that California banned them from checking codes in 2005 because they are not a licensed smog facility. Does anyone have any other ideas or do I have to bite the bullet and take it in to a shop?


you never posted,,,DID YOU PUT THE NEW O2 SENSOR IN THE DRIVERSIDE DOWN STREAM[AFTER CAT] LOCATION...

I believe they stated the passenger side was where it was to go,,,,, this would be incorrect with a PO137 DTC....

One thing to remember is that the companies doing these "research tests" with O2 sensors are usually hired by the company making the O2 sensor. I bought all four new 18 months ago because I thought it would be a good idea to replace the 200k+ originals. The only change I noticed in fuel milage came because I was no longer carrying around a heavy wallet. I don't doubt they should be changed, just dont expect a jump in fuel milage.

One thing to remember is that the companies doing these "research tests" with O2 sensors are usually hired by the company making the O2 sensor. I bought all four new 18 months ago because I thought it would be a good idea to replace the 200k+ originals. The only change I noticed in fuel milage came because I was no longer carrying around a heavy wallet. I don't doubt they should be changed, just dont expect a jump in fuel milage.


many years ago on a 1984 I thought the O2 sensor when not working would throw the check engine light ...this was before internet had any of this great info..

after 225,ooomi the code came that intermittently the O2 was not working correctly...when I removed the old sensor there was not much left to it..after replacing I noticed beter power and better MPG...

the upstream sensors are critical...the newer the vehicle these sensors are more of a issue..

the companies that recommend this 100,ooomi , are the companies making these products...

It is well known that these componets are in need of the changing at /around this mileage....

doing all hwy miles you can go longer,,,driving in traffic all day shorter....