Description:

This diagnostic code indicates that the calculated level of unintended combustibles in the Diesel Particulate Filter (DPF) is slightly higher than expected. This condition suggests that some combustibles are not being fully oxidized during the normal operation or regeneration process.

Reaction:

The ECU may initiate additional monitoring or adjustments to the regeneration process to manage the unintended combustibles, potentially leading to minor performance impacts to ensure emissions compliance.

Recommendations:

• Monitor Exhaust System: Regularly check the exhaust system, including the DOC and DPF, for any signs of malfunction or damage that could lead to unintended combustibles.
• Optimize Fuel Quality and Combustion: Ensure the fuel quality is good and that the engine is running efficiently to minimize the production of unintended combustibles.
• Conduct Manual Regeneration: If necessary, perform a manual regeneration to reduce the level of unintended combustibles in the DPF.
• Inspect for Leaks or Contaminants: Check for any leaks or contaminants in the exhaust system that could contribute to the presence of unintended combustibles.
• Reset ECU and Verify System: After addressing the issue, reset the ECU to clear the fault code and verify that the system operates correctly, ensuring the level of unintended combustibles is reduced.

Note:

Managing the level of unintended combustibles in the DPF is crucial for maintaining efficient aftertreatment system performance and ensuring compliance with emissions standards. Regular maintenance and monitoring can prevent buildup and associated risks.