[Gepeto]

CEL - 12B304 - Lambda probe heating after catalyst activation : Line Break

Got this code recently. Running a Bootmod3 with a custom tune - downgraded to OEM tune just to be sure. Reset codes, it comes back very fast now, as soon as the car is powered on (or powered on when warm at least).

It seems related to an O2 sensor, which might have broken.

Does the « after catalyst » in the code mean that it is the post-cat o2 sensor I need to fix?

Thanks!

[Gepeto]

Can one edit a thread title? My O2 sensor is not eating anything…..though my car might be eating O2 sensors? 😅

[Pray for Mojo]

Check the connection for the downstream o2 sensor, the one after the catalyst, I would follow the cable up and make sure its not disconnected. If everything is connected correctly you'll need to replace it.