Vehicles using 802 engine list:

Engine 802

Symptoms:
- Loss of power or reduced engine performance
- Rough idling or engine misfires
- Excessive smoke from the exhaust, especially black or white smoke
- Warning lights on the dashboard, such as the check engine light or DPF warning
- Increased fuel consumption
- Difficulty starting the engine or stalling

Diagnosis:
- Check for fault codes using an OBD-II scanner to identify specific sensor or system failures
- Inspect the Diesel Particulate Filter (DPF) for clogging or regeneration issues
- Examine the turbocharger for wear or damage, as it is critical for this engine’s performance
- Test the fuel injection system, including injectors and fuel pump, for proper operation
- Verify the condition of the EGR (Exhaust Gas Recirculation) valve, which can cause rough running if clogged
- Assess the air intake system for leaks or blockages

Fixes:
- Perform a forced DPF regeneration or replace the DPF if it is severely clogged or damaged
- Clean or replace the EGR valve to restore proper exhaust gas recirculation
- Repair or replace faulty fuel injectors or fuel pump components to ensure correct fuel delivery
- Service or replace the turbocharger if it shows signs of failure such as excessive shaft play or oil leaks
- Replace air filters and repair any intake leaks to maintain optimal air flow
- Reset fault codes after repairs and test drive to confirm resolution

Prevention:
- Use high-quality diesel fuel and adhere to recommended oil change intervals to protect engine components
- Regularly inspect and maintain the DPF system, including periodic long drives to allow passive regeneration
- Avoid frequent short trips that prevent the DPF from reaching regeneration temperature
- Keep the air intake system clean and replace filters as per manufacturer guidelines
- Address warning lights promptly to prevent further damage
- Schedule routine servicing with a qualified technician familiar with Renault diesel engines to catch issues early