Exhaust Gas Recirculation Flow Insufficient Detected
When the ECU commands EGR open, the actual flow measured by the DPFE sensor or the resulting MAP/MAF change is below threshold. By far the most common cause is a carboned-up EGR valve or blocked intake passages.
Affected components
- Egr valve
- Egr passages
- Dpfe sensor
Common causes
- High likelihood: EGR valve clogged or stuck closed
- High likelihood: Intake EGR passages blocked with carbon
- Medium likelihood: Vacuum line to EGR (vacuum-actuated valves) cracked
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.