Yet another PO442.
This is the Tahoe that had the bad spider last year, it was replaced along with the cap, rotor, plugs, wires, fuel filter, PCV valve/hose and Idle Air control valve.
Once all was changed and the car ran fantastic, (the only thing I question is that it takes about 1/2 second to 'catch' when I crank it, I remember it starting instantly when new. Thinking a new distributer someday).
Until early January when the CEL came on.
When I checked it with my code reader I got a 0442. B1S2
Now it was dripping fuel out the exhaust pipe for a year or two prior to the above mentioned repairs being performed and I always figured that a cat was in the near future but it ran so strong, even at high RPMs, that I figured I may have dodged a bullet. It has continued to run well so that when I saw the code I thought that it might be my downstream O2 sensor on the previously afflicted bank as that seems common. I did investigate with my rudimentary code reader (screen shots attached) but they look fine to me. Also, after about 6 or 8 weeks, the CEL is gone and the reader shows all is well.
If I remove them I'm not going to attempt any diagnostic tests with them, their low cost makes that seem like a waste of my time. I'm thinking that if I replace one 22 year old sensor I might as well change all four. And I'm tempted to do so but I figure that original sensors aren't going to come out without a fight. Likewise the cats. However, I'm a charter member of the "If It Ain't Broke, Don't Fix It" club as any unnecessary work always causes trouble.
Still, I'm wondering what could have caused the code to pop up and then go. Any ideas?
Thanks, Don
This is the Tahoe that had the bad spider last year, it was replaced along with the cap, rotor, plugs, wires, fuel filter, PCV valve/hose and Idle Air control valve.
Once all was changed and the car ran fantastic, (the only thing I question is that it takes about 1/2 second to 'catch' when I crank it, I remember it starting instantly when new. Thinking a new distributer someday).
Until early January when the CEL came on.
When I checked it with my code reader I got a 0442. B1S2
Now it was dripping fuel out the exhaust pipe for a year or two prior to the above mentioned repairs being performed and I always figured that a cat was in the near future but it ran so strong, even at high RPMs, that I figured I may have dodged a bullet. It has continued to run well so that when I saw the code I thought that it might be my downstream O2 sensor on the previously afflicted bank as that seems common. I did investigate with my rudimentary code reader (screen shots attached) but they look fine to me. Also, after about 6 or 8 weeks, the CEL is gone and the reader shows all is well.
If I remove them I'm not going to attempt any diagnostic tests with them, their low cost makes that seem like a waste of my time. I'm thinking that if I replace one 22 year old sensor I might as well change all four. And I'm tempted to do so but I figure that original sensors aren't going to come out without a fight. Likewise the cats. However, I'm a charter member of the "If It Ain't Broke, Don't Fix It" club as any unnecessary work always causes trouble.
Still, I'm wondering what could have caused the code to pop up and then go. Any ideas?
Thanks, Don