1997 GMC Sierra "o2" Questions

Reccieved P0141, P0147, P0340 as emission diagnostic trouble codes. What do these mean? P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2) P0142....O2 Sensor Circuit Malfunction (Bank 1 Sensor 3) ...

1998 gmc Sierra Engine light comes on and says O2 sensors. Replaced all sensors. Next day the light comes back on and says O2 sensors. What causes them to blow? Hi, there are a number of trouble codes

...mile. I have had it to two shops no results. It could be many things.... I will start to look at O2 sensor heater.... if you have a scanner to read data. Don't start engine the voltage should be ...

O2 sensor Where do I find the O2 sensor and how do I replace it? Follow your exhaust pipe/pipes leaving the engine in a rearward direction and the O2 sensor will be just before the catylitic converter

...random type of problem? Thanks for the help. Unplug the upstream (before the catalytic converter) O2 sensors. Take it for a drive. If the symptom improves plug one of the O2 sensors back in and ...

O2 sensor issue. Hi I have a GMC Sierra 1500 4.3L V-6 with a O2 sensor problem. I replaced it with a new one and cleared the ECM/PCM by disconnecting the battery cable (-). I tested it again using the

how many o2 sensors do I have on a 1993 gmc seirra I believe the 93 Sierra has only one O2 sensor. It is in the manifold on the drivers side. This assumes the 5.7L motor.

...and it is still running rough and now it gets a back fire when put into gear. I read codes says O2 sensor heater circuit malfunction (bank 2 sensor 1) Is this part of my problem? Yes bad o2

...GMC 3500 with 7.4L... The engine runs extremely rich. someone has installed headers, I don't see an O2 sensor. could this be the problem? were is the wiring harness for the O2 sensor if I was to ...

...heater control circuit on a gmc and were is it located 2006 gmc sierra 6.0 litre it has to do with o2 sensor. The o2 sensors in that truck are heated. You probably have a bad o2 sensor if you have a ...