Description:

This diagnostic code occurs when the DPF (Diesel Particulate Filter) differential pressure sensor fails to respond or when the ECU identifies a discrepancy between the exhaust flow and the differential pressure across the DPF. This may indicate blockage, sensor failure, or inaccuracies in data processing.

Reaction:

The ECU may adjust the regeneration frequency, alter engine performance, or display a warning to prevent potential damage to the DPF or ensure compliance with emission standards.

Recommendations:

• Inspect DPF System: Check for signs of clogging or damage that might affect differential pressure readings.
• Test Differential Pressure Sensor: Verify the functionality and accuracy of the sensor. Check for proper calibration against known pressure differentials.
• Replace Faulty Sensor: If the sensor is found to be defective or unresponsive, replace it to ensure accurate monitoring of DPF conditions.
• Reset ECU and Perform System Tests: After sensor replacement, reset the ECU to clear the fault and conduct tests to confirm the system is accurately measuring DPF differential pressure.
• Monitor DPF Performance: Regularly monitor the DPF performance post-repair to ensure no further issues arise.

Note:

Maintaining accurate differential pressure readings is crucial for the effective operation of the DPF system and to prevent undue stress on the engine due to improper exhaust flow management.