DTC P0400 EGR "A" Flow: Notes

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

Trouble symptom:

Movement performance problem when engine is low speed.
Improper idling
Movement performance problem

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Clear Memory Mode>OPERATION . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Inspection Mode>PROCEDURE .

CHECK DATA MONITOR .
1. Start the engine.
2. Using the Subaru Select Monitor or a general scan tool, read the value of [Mani. Absolute Pressure].
NOTE:
- Subaru Select Monitor
  For detailed procedures, refer to "Data Monitor". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Subaru Select Monitor .
- General scan tool
  For detailed operation procedures, refer to the general scan tool operation manual.
Is the value of [Mani. Absolute Pressure] 53.3 kPa (400 mmHg, 15.75 inHg) or more?
- Yes: Make sure that the EGR control valve, manifold absolute pressure sensor and throttle body are installed securely.
- No: Go to 2 .
CHECK EGR CONTROL VALVE .
Remove the EGR control valve.

Are there any holes, clogged lines or foreign matters in the EGR system?
- Yes: Repair the EGR system.
- No: Replace EGR control valve. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>EGR Control Valve .