CAMARO6 - View Single Post - P0420 Catalyst System below threshold bank 1

Blueclyde · 12-07-2021, 08:27 PM

Only the front catalysts are monitored. The rear catalysts can be removed, and if done properly (no leaks), the system will not set catalyst efficiency codes.

12-07-2021, 08:27 PM	#11
Blueclyde Drives: 2023 ZLE Join Date: Jun 2009 Location: Detroit Posts: 1,717	Only the front catalysts are monitored. The rear catalysts can be removed, and if done properly (no leaks), the system will not set catalyst efficiency codes.