2021 Honda Civic Type R MIL On DTC P0300/P0304

Background: Honda's Misfire Investigation

American Honda Motor Co., Inc. (AHM) has initiated a special investigation into certain 2021 Honda Civic Type R vehicles. The focus is on vehicles where the "Malfunction Indicator Light (MIL)" is illuminated, accompanied by Diagnostic Trouble Code (DTC) P0300, indicating a "Random Misfire Detected," or DTC P0304, signifying a "No. 4 Cylinder Misfire Detected."

This proactive measure, identified as "Request for Parts: 2017-2021 Civic Type R MIL On DTC P0300/P0304 (ACTION REQ'D)", aims to gather specific vehicle components. By collecting these parts before any repairs are attempted, Honda seeks to gain a deeper understanding of the underlying cause of these misfire conditions. This will help in developing effective solutions for the 2021 Honda Civic Type R MIL P0300 P0304 issue.

Symptoms

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

• Illumination of the "Malfunction Indicator Light (MIL)" on the dashboard.

This warning light is typically triggered by the detection of engine misfires, which are further identified by specific diagnostic trouble codes.

Fault Codes / DTCs

The investigation specifically targets vehicles storing the following Diagnostic Trouble Codes:

• P0300: "Random Misfire Detected"
• P0304: "No. 4 Cylinder Misfire Detected"

Vehicles displaying other misfire-related codes, such as P0301, P0302, or P0303, are explicitly excluded from this particular parts collection initiative.

Qualifying Conditions for Investigation

For a 2021 Honda Civic Type R to be considered for this parts collection and investigation, it must strictly adhere to the following criteria:

• The vehicle must only have DTC P0300 and/or P0304 stored. The presence of P0301, P0302, or P0303 will disqualify the vehicle.
• 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 any collision.
• Crucially, no repair attempt should have been made for the misfire issue prior to contacting Honda.

These conditions ensure that the collected parts provide the most accurate data for Honda's analysis of the 2021 Honda Civic Type R MIL P0300 P0304 problem.

Important Warnings

Owners and technicians should be aware of the following critical points regarding this investigation:

• Do not attempt repairs on the misfire condition if you intend for your vehicle to be considered for this parts collection. Honda requires that no repair has been attempted for the issue.
• Vehicles with DTCs P0301, P0302, or P0303 will not qualify for this specific investigation, even if P0300 or P0304 are also present. The vehicle must only have P0300 and/or P0304 stored.

Action Required for Owners

If your 2021 Honda Civic Type R is experiencing an illuminated "Malfunction Indicator Light (MIL)" with DTC P0300 or P0304 and meets all the qualifying conditions, you or your dealership should contact Honda's Technical Information & Support (TIS) group. You can reach them via email at [email protected] or by calling 800-880-1072, Monday through Friday, 7 AM to 5 PM PST.

When contacting TIS, be prepared to provide specific vehicle information. For email inquiries, the subject line should include:

1. Model Year (e.g., 2021)
2. Model Name (e.g., Civic Type R)
3. Issue (e.g., MIL with P0300/P0304)
4. VIN

The email body should contain:

1. Dealer Number
2. Your Name
3. Best Phone Number to be Reached
4. Current Mileage
5. DPTS#

This information is vital for TIS to record your vehicle's details and provide further instructions regarding the parts collection process for the 2021 Honda Civic Type R MIL P0300 P0304 issue.

Technician Incentive

As a token of appreciation, American Honda Motor Co., Inc. will provide a Visa gift card to technicians who successfully identify and report a qualifying vehicle. This incentive is for those whose vehicles are accepted as candidates for the Dealer Visit/Parts Collection/Info Collection program.

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Source: NHTSA ID: 10242562