2021 Honda Civic Type R MIL On P0300 P0304

American Honda Motor Co., Inc. (AHM) has issued a manufacturer communication regarding certain 2021 Honda Civic Type R vehicles experiencing illumination of the Malfunction Indicator Light (MIL) accompanied by Diagnostic Trouble Codes (DTCs) P0300 or P0304. This initiative aims to understand the underlying cause of these engine misfire conditions.

Specifically, AHM is requesting that dealerships identify and report vehicles that meet precise criteria for parts collection. The goal is to gather specific components from affected vehicles before any repair attempts are made, providing crucial insights into the issue. If your 2021 Honda Civic Type R is displaying the MIL with a Civic Type R P0300 P0304 fault, it may be eligible for this program.

Symptoms

Owners of affected 2021 Honda Civic Type R vehicles may observe the following:

• Illumination of the "Malfunction Indicator Light (MIL)" on the dashboard.
• Storage of DTC P0300, indicating a "Random Misfire Detected."
• Storage of DTC P0304, indicating a "No. 4 Cylinder Misfire Detected."

These symptoms point to an engine misfire condition that Honda is actively investigating.

Fault Codes / DTCs

This manufacturer communication specifically addresses vehicles with the following Diagnostic Trouble Codes:

Code	Description
P0300	Random Misfire Detected
P0304	No. 4 Cylinder Misfire Detected

It is critical to note that vehicles storing DTCs P0301, P0302, or P0303 are not eligible for this parts collection program.

Trigger Conditions / Qualifiers for Parts Collection

Honda is interested in collecting parts only from 2021 Civic Type R vehicles that meet all of the following strict requirements:

• The vehicle must only have DTC P0300 and/or P0304 stored. If any other misfire codes (P0301, P0302, or P0303) are present, the vehicle does not qualify.
• There must be no deformation or chipping around the plug top coil seating area.
• Previous replacement of the cylinder head cover, plug top coil, or spark plugs is acceptable, provided it is disclosed.
• The vehicle must not have been involved in a collision.
• No repair attempt of any kind has been made for this specific issue.

Important Warnings

Owners and technicians should be aware of these critical conditions:

• "If P0301, P0302 or P0303 are stored, the vehicle does not qualify." This is a strict exclusion for the parts collection program.
• "No repair has been attempted for this issue." Honda requires that no prior repairs have been made to the misfire condition for the vehicle to be eligible for their investigation.

Manufacturer's Investigation

American Honda Motor Co., Inc. is conducting this parts collection to gain a deeper understanding of the cause of the engine misfire condition affecting 2017-2021 Civic Type R models. By collecting specific components from vehicles exhibiting the Civic Type R P0300 P0304 codes, Honda aims to pinpoint the root cause before developing a comprehensive repair strategy. This proactive approach helps ensure future repairs are effective and addresses the issue thoroughly.

Owner Action

If your 2021 Honda Civic Type R is experiencing a Malfunction Indicator Light (MIL) illumination with DTC P0300 and/or P0304, and meets the specific qualifiers listed above, you should contact your authorized Honda dealership. The dealership's Technical Information & Support (TIS) department will need to record your vehicle information and provide further instructions. This process is crucial for Honda's investigation into the Civic Type R P0300 P0304 issue.

As a gesture of appreciation, Honda is offering a Visa gift card to dealer technicians who identify and report a qualifying vehicle that is accepted into the program.

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Source: NHTSA ID: 10240328, Manufacturer Communication