Vehicles using OM654.820 engine list:

Engine OM654.820

Symptoms:
- Rough idling or engine misfire
- Loss of power or reduced fuel efficiency
- Warning lights on the dashboard, such as the check engine light
- Excessive smoke from the exhaust, particularly black or blue smoke
- Unusual noises from the engine bay, including knocking or ticking sounds

Diagnosis:
- Use an OBD-II scanner to retrieve fault codes related to fuel injection, turbocharger, or emission control systems.
- Inspect the diesel particulate filter (DPF) for clogging or regeneration issues.
- Check the turbocharger for shaft play or oil leaks.
- Examine the high-pressure fuel pump and injectors for wear or malfunction.
- Verify the condition of the EGR (Exhaust Gas Recirculation) valve for carbon buildup or sticking.
- Perform a compression test to assess cylinder health.

Fixes:
- Clean or replace the diesel particulate filter if clogged.
- Repair or replace faulty fuel injectors or the high-pressure fuel pump.
- Service or replace the turbocharger if damaged or leaking.
- Clean or replace the EGR valve to restore proper function.
- Update engine control software to the latest version to address known issues.
- Replace worn timing chain components if timing-related noises are present.
- Use manufacturer-approved diesel fuel and additives to maintain injector cleanliness.

Prevention:
- Adhere to regular maintenance schedules, including timely oil and filter changes using approved lubricants.
- Use high-quality diesel fuel to minimize injector and DPF contamination.
- Avoid frequent short trips that prevent the DPF from reaching regeneration temperature.
- Monitor and address warning lights promptly to prevent further engine damage.
- Ensure software updates are applied during servicing to optimize engine performance and emissions control.
- Periodically inspect turbocharger and EGR components for early signs of wear or blockage.

By following these diagnostic steps, fixes, and preventive measures, owners of vehicles equipped with the OM654.820 engine can maintain optimal performance and longevity.