2005 Lexus LS430 6 Cyl 100,000 mi with engine code P0420

Question

Would a hole in the Y pipe generate the P0420 for a 2005 Lexus LS430 6 Cyl 100,000 miles?

Answer 1

Hi there,

The answer is yes, any type of exhaust leak can cause issues with the converter and the O2 sensors, so it is possible it's causing the code.

Answer 2

P0420 Lexus Code - Catalyst System Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0420_lexus.html