BMW E46 Fanatics Forum banner

1 - 4 of 4 Posts

·
Registered
Joined
·
11 Posts
Discussion Starter #1
2003 330 XI - Hi I just got new sensors put in so I can prep for inspection. On my way home, the check engine light came back on. I check the codes and it says:

Aftercat 02 sensor voltage 1-3 and 4-6

What does this mean, voltage too high? Too low?

Please help and thanks.
 

·
Registered
Joined
·
75 Posts
2003 330 XI - Hi I just got new sensors put in so I can prep for inspection. On my way home, the check engine light came back on. I check the codes and it says:

Aftercat 02 sensor voltage 1-3 and 4-6

What does this mean, voltage too high? Too low?

Please help and thanks.
Don't know what type of reader your using, but I'm guessing it means voltage on both cylinder banks 1-3 and 4-6. If your getting an error on both, and you just installed new ones, you might have crossed the connectors.

I would start there.
 

·
Registered
Joined
·
11 Posts
Discussion Starter #3
Don't know what type of reader your using, but I'm guessing it means voltage on both cylinder banks 1-3 and 4-6. If your getting an error on both, and you just installed new ones, you might have crossed the connectors.

I would start there.
Thank you, I'm gonna look into that!
 

·
Registered
Joined
·
11 Posts
Discussion Starter #4
I swapped the connectors and got the same errors and a Fuel tank breather valve error. Safe to assume these o2s are bad?
 
1 - 4 of 4 Posts
Top