my truck

Hello everyone new to this site,
I have a 2005 Dodge Hemi 1500 4x4 it only has 6300 miles on it and I already had it in the shop twice. They put a new O2 cesor in it and now the engine light went on again. The code says (catalyst system efficiency below threshold) (bank one). Does anyone know what this means? Please help driving me crazy they took five hous to figure the O2 sencor out so I took it to Auto zone this time it took them 2 minutes to tell me the problem, so I want to be prepaired when I take it back to the dealer.

Thanks,
Chuck

Here is a good link on it.
http://www.troublecodes.net/articles/catfailure/

Also
Tip on going to the dealer
Ask that only a factory certified gasoline engine performance specialist work on your car.
Not all dealerships are concerned with how repairs are dispatched, and not all dealership techs bother to take advantage of the training offered by factory (the vast majority of which is paid training). If the dealer is uncooperative, ask for your money back and call around for a dealer that will accommodate you.

Also remeber that a code does not say replace the sensor it says check it out. Many things besides the seensor or cat can set a 02 sensor or a cat code.

Good luck MT :)

yes you may suggest your dealer perform bulletin #18-025-05 witch deals with this issue consists of reflashing engine controller and replacing downstream o2 sensor on the affected bank