catalytic converter on 2005 Nissan Armada

can this converter cause a need to replace the engine. That is what the dealership explained to us. The converter blew back into the engine causing sensor failure and the need to have the engine replaced.

by in Haughton, LA on August 25, 2010
1 answer
ANSWER by on August 25, 2010
This does not sound like it makes any sense to me, unless the engine caught on fire. The CAT can't really 'blow back' it can be restricted and cause the engine to get hotter than normal, from over working. What is your Nissan doing that it is in the shop. Did it stop running?
Related Items:
Service engine light came on a month or two ago. Failed state inspection report indicated both...
Code 0420/0421-catalytic converter showed up. How do I clear this without Replacing converters (2). Would a new gas cap help?...