TSB Document:

Affected Component: ENGINE AND ENGINE COOLING

Summary
Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2018 Fits with customer complaint of Check Engine Light (CEL) on with DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting a repair of any kind.

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Date Published
JAN 17, 2024
NHTSA TSB #
10249201
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