Exhaust Gas Recirculation Flow Malfunction
A general fault has been detected in the exhaust gas recirculation (EGR) system. EGR routes a portion of exhaust back into the intake to reduce combustion temperature and NOx emissions. Most EGR codes today are caused by carbon buildup blocking the valve.
Affected components
- Egr valve
- Egr cooler
- Dpfe sensor
Common causes
- High likelihood: EGR valve clogged with carbon
- Medium likelihood: Intake EGR passages blocked
- Low likelihood: DPFE / EGR position sensor failed
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.