Here is the situation

1) I had an injector get stuck open

2) Limped the truck home (20 Miles)

3) Replaced the Injector, Plug, COP

Now i have a P0420 Code Catalyst System Efficiency Below Threshold (Bank 1).

Truck has a little hesitation but no other symptoms.

Now my question,

Since the fuel was pouring into the cylinder and I like an Idiot limped the truck home, Have I toasted the Cat on the Bank 1 Side?

After reading through the various P0420 Posts that sure seems to be the case. One post said that the excess fuel ruins the catalyst and it is time to replace the cat, other posts say that there are a variety of issues with sensors that could be causing the code.

What do you guys think?

Thanks in Advance!

-M

 

Yes, most likely. An exhaust shop can check it for you. You're lucky you did not hydro lock the engine.