I have a 1996 Blazer (W code). Occasionally (usually when I drive a long distance at 60mph or more) my Check Engine Light comes on. I had autozone run the OBD II test to get the reading "low emissions, bay 1" . They reset it and it comes back every once in a while with the same error. Can anyone tell me what bay 1 might mean? I thought it may be the 1st Oxygen sensor of the many that are on this thing. I heard GM can do a better test than Autozone but its 80 bucks too. Usually I just remove the two 20amp fuses to the guages for a minute or two to reset this myself now instead of having Autozone do it. I dont want to guess at which oxygen sensor it may be (if it is that) since each is about 50 bucks. Can anyone give me some info???
