DTC P0400: EGR "A" Flow: Notes
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) (H4PO)>Basic Diagnostic Procedure>PROCEDURE
.
- CHECK DATA MONITOR
.
- Start the engine.
- Using the Subaru Select Monitor or a general scan tool, read the value of [Mani. Absolute Pressure].
Data Monitor
NOTE:- SUBARU SELECT MONITOR For detailed operation procedures, refer to "Data Monitor". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DATA 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 .