10-22-2009, 04:26 PM
Oh, and regarding those other posts about checking the O2 sensors before going to the expense of a cat replacement, right on. It is always worth it to have your o2 sensors working correctly because a malfunctioning sensor can cause a bad cat. You should figure out why your cat failed before replacing it and ruining a new one.
As to the original question, if it is just a check engine light (which likely indicates that the O2 sensors are detecting a failed cat), you can probably go a while unless there is some other evidence of mechanical cat failure (i.e. blockage).
As to the original question, if it is just a check engine light (which likely indicates that the O2 sensors are detecting a failed cat), you can probably go a while unless there is some other evidence of mechanical cat failure (i.e. blockage).