Question

I have a 2004 Chevrolet Tahoe the error code p0430, engine light on. Besides changing the catalytic converter what can I do?

Answer 1

In some cases the rear O2 sensor can cause this code to come up. Most common you have to replace the converter, however if you have a scan tool that shows live data you can watch the rear O2 on bank 2 and determine which is the cause.

Answer 2

P0430 CHEVROLET - Catalyst System Low Efficiency Bank 2

Read more: https://www.autocodes.com/p0430_chevrolet.html