On Board Diagnosis Logic
If the absence of EGR flow is detected by EGR temperature sensor under the condition that calls for EGR, a low-flow malfunction is diagnosed.
DTC DETECTING CONDITION & POSSIBLE CAUSE
| DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause |
|---|---|---|---|
| P0400 0400 | EGR function (Close) | No EGR flow is detected under the condition that calls for EGR. |
|