DTC P0400: EGR "A" Flow: Notes

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

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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
NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

G13615301

Courtesy of SUBARU OF AMERICA, INC.

CHECK DATA MONITOR .
1. Turn the ignition switch to ON.
2. Navigate to Inspection Mode for measuring Exhaust Gas. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>WORK SUPPORT>OPERATION>SERVICE MODE .
  NOTE: If it is necessary to run the engine for 10 minutes or more, fasten the driver's seat belt.
3. Start the engine.
4. Using the Subaru Select Monitor, read the value in [Mani. Absolute Pressure].
  NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (DIAG)>DATA MONITOR .
  
  Is the value of [Mani. Absolute Pressure] 53.3 [kPa] (400 mmHg, 15.74 inHg, 7.73 psi) 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 (HEV))>EGR CONTROL VALVE .