MIL Comes On With DTC P0401 – 2005-2008 Acura RL

March 26, 2008


Applies To:
2005–07 RL – ALL
2008 RL – From VIN JH4KB16..8C000001 thru JH4KB16..8C004681

MIL Comes On With DTC P0401

(Supersedes 08-006, dated March 14, 2008, to update the information marked by the black bar)



The MIL comes on with DTC P0401 (EGR insufficient flow).



The fuel injectors’ spray pattern creates unwanted carbon buildup around the EGR valve opening, which restricts the airflow.



Replace the fuel injectors and the EGR valve.



EGR Valve 18011-PXK-030
Fuel Injectors (Qty. 6) 16450-R70-A01 
Intake Manifold Gasket 17105-RCA-A01 
Upper Intake Manifold Cover Gasket 17146-RKB-003



In warranty: The normal warranty applies.

NOTE: Separate claims must be filled out for the EGR valve replacement and the fuel injector replacement.

OP# Description FRT
121150 Replace the EGR valve. 0.3
1211N0 Replace the fuel injectors. 1.1
123503 Clear the DTC. 0.3
Failed Part: EGR valve:

P/N 18011-PXK-030

Fuel injectors:

P/N 16450-R70-A01

Defect Code: EGR replacement: 03214 Fuel injector replacement: 03217
Symptom Code: EGR replacement: 03203

Fuel injector replacement: 03205

Skill Level: Repair Technician

Out of warranty: Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.



  1. Replace the EGR valve:
    • Refer to page 11-379 in the 05–08 RL Service Manual, or
    • Online, enter keywords EGR REPLACE, and select EGR Valve Replacement from the list.
  2. Replace all of the fuel injectors:
  3. Clear the DTC with the HDS.



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