Question

2005 Lincoln LS 3.0L with code P0430 - what is this? Just had 1,900 of work -throttle body, motor assembly, 4 ignition coils, and plugs.

Answer 1

Check for exhaust leaks. If no leaks are found, then you must replace the Catalytic Converter to fix the problem.

P0430 LINCOLN - Catalyst System Efficiency Below Threshold Bank 2
Read more: https://www.autocodes.com/p0430_lincoln.html

Answer 2

First you can inspect for exhaust leaks. Next step is to measure the voltage at the oxygen sensor