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98 ve catalytic converter


98tealcorolla

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I've got a 1998 corolla ve with an exhaust leak at the seal between the exhaust manifold and the header pipe. Also, I'm getting the trouble code P420 Catalyst Efficiency Below Threshold (bank 1).

My questions are:

(1) Will I need to purchase new parts from the manifold all the way to the tail pipe? The car has >150K miles. Will I be able to get the parts separated? I don't have a torch.

(2) Can O2 sensors be reused?

(3) Is it a complicated job to replace all the parts? I have replaced struts, radiator, starter, and breaks. I have not done exhaust before.

Thanks,

Bob

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