P0420 indicates that the catalytic converter on bank 1 is not operating efficiently A faulty ignition switch can sometimes cause circuits to remain energized even when the vehicle is turned off, leading to parasitic drain The engine control module has detected that catalyst efficiency is below the.
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P0420 means bank 1 catalytic converter efficiency is below threshold
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If no additional codes are present, clear code p0420, and operate the vehicle normally for a few miles to allow the pcm to enter closed loop operation, before scanning the system again to see if. Popular porsche macan fault codes along with an explanation of their meanings Find out what you can do next to solve the problem you are experiencing. Luckily, this article is designed to guide you through understanding the implications of this.
P0420 means catalyst system efficiency below threshold (bank 1) Safe to drive, but fix promptly
