2002 Silverado Code P0140

I have a 02 silverado 4.3L 5-speed. I have the SES light on and has been for a while. The truck drive fine, but sometimes has a miss/skip when you put it into 5th gear but don't have alot of rpm's. Ex. going 50 mph in 5th gear it misses. The code is (P0140) o2 sensor bank 1 sensor 2. Is this problem related to the sensor going bad? I am going to replace the sensor (which is the driver side, between cat. and muffler I think?) , but will this fix the missing problem or are the two unrelated?

Thanks in advance,
Jason

hard to say over the net!

I also changed all the plugs and plug wires. The miss happens in all gears, but most of the time in 5th. It don't miss going through the gears, but if you are driving steady with lower rpms, it misses. The miss also doesn't happen every time you drive it. You may go 3-4 days without any miss, and then miss 3-4 times in one day?

I'd suggest a new dist cap and rotor from the dealer!

thank you, i will try this....

also is the o2 sensor bank 1 sensor 2 the one on driver side between cat and muffler?

Yup.

thanks