I'm having the same issue with my hummer h3. Check eng light is on an a sulphur Smell is being detect inside the car. We already replace the oxygen sensor, the MAF and MAP but the problem continue. Is there any solution that you can give me?*

 

Which 02 sensor did you replace(exact location)? What kind/brand of 02 sensor did you use(w/connector-wo/connector & name brand)? Please advise, for further information.

 

Hi Thanks for your help. Please see comments in bold

Which 02 sensor did you replace(exact location)? I replaced the first, the one that is before the catalytic. Then also I replace the second, that is after the catalytic
What kind/brand of 02 sensor did you use(w/connector-wo/connector & name brand)? The part number is AC2133908 From AC Delco. I used the one with connector.

Is there anything that could be related to the emission system? Maybe the Purge valve or the Vapor Canister, The MAP of the MAF

thanks

 

Hi Thanks for your help. Please see comments in bold

Which 02 sensor did you replace(exact location)? I replaced the first, the one that is before the catalytic. Then also I replace the second, that is after the catalytic
What kind/brand of 02 sensor did you use(w/connector-wo/connector & name brand)? The part number is AC2133908 From AC Delco. I used the one with connector.

Is there anything that could be related to the emission system? Maybe the Purge valve or the Vapor Canister, The MAP of the MAF

thanks

 

I know there are many problems with some aftermarket 02's, this code means that on a warmed up engine, the signal from the front oxygen sensor of the bank 1 switches between lean and rich air/fuel conditions too slow("lazy") or its amplitude (voltage) is out of expected range. This code could be caused by a defective or contaminated O2 sensor, 02 sensor wiring problems or plenty of other reasons, such as exhaust leaks, too lean or too rich condition, intake leaks, a bad mass air flow sensor,vacuum leak, etc. Check for leaks, clean maf sensor, take the sensor out and take a look at it, check the connector/wiring. GL

 

Thanks for the information. Could you please suggest me a sensor type or a part number to use.? Should I use AC Delco?

 

Delco is fine! I also like Denso... If your ACdelco sensor has failed already, chances are, there is another problem. Did you take it out and look at it? Check the connector/wiring(look for corrosion @contacts, damaged wiring)? Still a possibility it is a faulty sensor, if you have a warranty get another 1.

 

Yes we already check wiring and connection. no problems were detected.

 

Did you pull the 02? What does the 02 look like? Contaminated? Post a pic of it.