ECU 005298.18 – DOC Efficiency Moderately Low. John Deere System Advisory.

ECU 005298.18 (ECU 5298.18)

Code: 005298.18

Shortcode: 5298.18


This code indicates that the Diesel Oxidation Catalyst (DOC) efficiency is moderately low. It is currently used for engineering purposes only and may not trigger immediate action but provides valuable data for system monitoring and diagnostics.


The ECU monitors the DOC efficiency and may make adjustments to ensure continued operation within safe parameters.


  • Monitor DOC Performance: Continue to monitor the DOC performance and efficiency. If further issues arise, follow diagnostic procedures for DOC efficiency.
  • Inspect DOC: Check the DOC for signs of wear or buildup that could lead to efficiency issues.
  • Maintain Fuel System: Ensure the fuel system is clean and functioning correctly to support optimal DOC performance.
  • Regular Maintenance: Perform routine maintenance on the emissions control system to prevent efficiency declines.


This code is primarily for data collection and system monitoring purposes. Regular maintenance and timely interventions can help maintain DOC efficiency.

Control Units: John Deere

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