New to the crew! (With codes... P0420 and P0641 )

Hello Everyone,

I come here often for answers so I figured I would join the chat! Anyways I have a 2009 chevy Aveo LT. Well about 3k miles ago I hit my 100,000 mark. Shortly after things starting going downhill, I just recently replaced all my tires, the spark plus, ignition coil, and both 02 sensors. I only changed the 02 sensors because that's what was coding, the car started bucking and revving to 4000RPM but wont accelerate over 60-65 MPH, if I am going up a hill it actually starts slowing down. So I thought my 02 sensors would cause this, so they're brand new and the car is still acting up.

Well yesterday the check engine light came back on and I was able to get the codes. P0420 and P0641 both came up. P0240 said "pending" and P0641 said "confirmed". I am not sure what that meant but I read a few places and have mixed signals.

I guess my questions is can one code cause the other and if so would it be a bad catalytic converter or a circuit somewhere? I've learned a lot about doing it myself since I am a single mom and a repair man is most of the time out of budget. Any suggestions? ](*,)
http://www.aveoforum.com/forum/attac...ntry-codes-jpg
HELP!!
Marie

Hi vanitysins - welcome to the group.

Have you searched on those codes? I checked and there are half a dozen threads on the P0641 code.

In this one, a member found a damaged connector that caused the code:
Thread: 2009 Chevy Aveo5 - error code P0641 (Update - FIXED - damaged connector)