I HAVE A 1996 FORD EXPLORER, I HAD THE AUTO ZONE COMPUTER THING AND IT SAID I NEEDED A OXYGEN SENSOR SO I BOUGHT ONE, HAD IT PUT ON AND THE CHECK ENGINE LIGHT IS STILL ON. NOW WHAT. I NEED TO GET INSPECTED BUT CANT WITH THAT LIGHT AND WHEN I RESET IT, THE LIGHT WENT OFF FOR ABOUT 2 HOURS AND CAME BACK ON WHAT DO I DO NOW?
If the your car has gone to 3 different shops and their code reader detected a fault with the same code and has been replaced with a new one then the problem may lye in the a faulty wire to or from the main computer. Depending on the code reader they were using may not have the capability to perform a function that will reset adaptation or monitor the suspected part. Some late model cars have the capability of flashing the prom chip in the computer that fixes any known bugs in the chip. I suggest taking the car to the GMC dealer because they have the proper test equipment to monitor and performed specific activation test to isolate the problem. Your chances of them finding the culprit is much likely than a shop that doesn't have the proper equipment. If they do pinpoint the problem in a timely fashion they will call u give an accurate estimate to repair it. And that's when u decide if it's not worth fixing. But give them a try. It beats financing a new car and keeping the extra funds for more important things. Good luck!
You got screwed. There is no OBD II code for Bad Oxygen Sensor, Replace. The codes only tell you the symptom. They do not tell you what to replace. There are codes that indicate an Oxygen sensor is not functioning properly, but that does not mean the sensor is bad. The problem can be (and usually is) caused by something else. Since you replaced the O2 sensor and the problem returned then we can be fairly sure the O2 sensor was not the real problem. You need to go to a real shop with real diagnostic equipment and expertise to have a real diagnostic done to find and fix the problem.
Firstly you are going to have to separate the two of them so that the famale can lay her eggs in peace, get an incubator for the eggs
Hey I agree with robert h usually there's up to three 02 sensors. 1 or 2 up stream (ahead) of the converter called pre-cat 02 sensors and 1 usually after or post cat 02 sensor.They did the same thing to me on my dodge and it was actually the post-cat 02 not the pre-cat 02 that they told me.And unplugging the light is not going to work. OBDII stores DTC's (diagnostic trouble codes) which turn on MIL (malfunction indicator lamp) check engine,etc., in the computer.If you disconnect the neg. battery terminal and turn the key to start and hold it(neg. still disconnected) for 5-6 seconds it might clear it, but if you go for emissions test shortly after it will show a tamper error in the system.Automatic failure.Basically not enough start up cycles/miles for the system to re-learn.See if they were using a code/reader or a scanner at autozone.If they use a scanner it should give 02 readings.I believe Milli amps the pre-cat 02's voltage jumps around alot .200/.900 were the post cat seem to be alot slower and not much fluctuation in voltage stay more on the high side.900/.700 I'd lean toward a post cat 02.(u didn't say which one u changed) See if they pull another code(It's free).good luck
