2024 Honda Civic Emissions Recall: PGM-FI Software Update

Why This Matters

Honda has identified an issue with the software in the Programmed Fuel Injection (PGM-FI) and Serial Data Gateway Module (CAN gateway) in certain 2024 Civic vehicles. This incorrect software prevents the Malfunction Indicator Lamp (MIL) operation of the ECU internal voltage sensor monitor from functioning according to regulatory requirements. This emissions recall ensures your vehicle complies with environmental standards and that safety systems operate as intended.

What's Being Recalled

This emissions recall, documented under Honda Service Bulletin 24-063, specifically targets the software within the PGM-FI and Serial Data Gateway Module. The affected vehicles are 2024 Honda Civic models, excluding LX and Type R trims. The issue is purely software-related and does not involve a physical component replacement, although a failed part number 37805-64A-AF2 is associated with the PGM-FI unit containing the original software.

Symptoms

The primary symptom of this issue is that the ECU internal voltage sensor monitor's MIL operation does not meet regulatory requirements. This means your vehicle's check engine light (MIL) might not illuminate as it should if certain voltage sensor issues occur, potentially masking underlying problems and affecting emissions compliance. The Symptom Code associated with this condition is M1800, and the Defect Code is 6AJ00.

Corrective Action

The remedy for this 2024 Honda Civic emissions recall is a software update for both the PGM-FI and Serial Data Gateway Modules. This update will ensure that the ECU internal voltage sensor monitor operates correctly and adheres to all regulatory standards. The repair is covered under warranty and will be performed free of charge by authorized Honda dealers.

Important Warnings for Owners and Technicians

• Owner Notification: Owners of affected vehicles will receive a notification letter regarding this campaign. It is crucial to respond to this notification by scheduling service at a Honda dealership.
• Vehicles in Inventory: Any new or used 2024 Honda Civic vehicles affected by this campaign that are currently in dealer inventory must be repaired before they can be sold.
• Approved Tools: Technicians must not use the MongoosePRO VCI device for this service bulletin, as it is not an American Honda-approved tool.
• Battery Condition: Before starting any software update, ensure the vehicle's 12-volt battery is fully charged. Do not use a lithium-ion jump pack to supply power during reprogramming, as these do not provide consistent voltage.
• Power Supply: Connect a Midtronics GR8-110P AST in Power Supply Mode or a Midtronics DCA-8000 Dynamic Diagnostic Charging System in Reflash Mode directly to the vehicle's 12-volt battery. This must remain connected throughout the entire procedure to maintain stable voltage.
• Electrical Operation: To prevent control unit damage, do not operate any electrical components (headlights, audio system, brakes, A/C, power windows, door locks, etc.) during the software update.
• Warranty Coverage: Control module failure resulting from improper completion of a software update (e.g., early key cycle, low battery voltage, disconnected DLC cable) is not covered under warranty.

Repair Procedure Summary

Servicing your 2024 Honda Civic for this emissions recall involves several key steps performed by a skilled technician:

1. Software Preparation: The technician will ensure all diagnostic and reprogramming software, including i-HDS, HDS, Honda ECU Reprogramming, J2534 Rewrite, and Honda Download Manager, are updated to the specified versions.
2. Vehicle Preparation: The vehicle's 12-volt battery will be fully charged, and a stable power supply will be connected to maintain voltage throughout the process.
3. Software Selection: Using the Honda ECU Reprogramming application, the technician will select and download the necessary software updates for the CAN-Gateway, CANGW Internal, and PGM-FI modules.
4. Reprogramming: The update process will be initiated, following on-screen prompts. If an error occurs or the i-HDS freezes, the technician will reboot the i-HDS and restart without disconnecting the battery or turning off the ignition.
5. Post-Update Checks: After the update is complete, the technician will cycle the ignition OFF to ON as prompted, then perform an ALL DTC Check and ALL DTC Clear to ensure no new fault codes are present.
6. California Residents: For vehicles registered in California, a