Accord L4-2156cc 2.2L SOHC (1991)
EGR Valve: Customer Interest
Emissions - Hesitation/Stumble On Accel/Multiple DTC's
98-074
March 4, 2010
Applies To:
1990-1993 Accord L4 - ALL
1997-2001 Prelude - ALL
Hesitation or Stumble With Possible DTC(s) P0141, P0171, P0300, P0301, P0302, P0303, P0304, P0401, or P1491
(Supersedes 98-074, dated April 20, 2007, to revise the information marked by the asterisks)
*REVISION SUMMARY
Under REQUIRED SPECIAL TOOLS, the part numbers and ordering information for individual kit items were added.*
SYMPTOM
An engine hesitation or stumble can be felt under light acceleration between 1,500-2,000 rpm. In addition, on 1997-2001 Preludes, one or more of these
DTCs may be stored:
^
P0141 (Secondary heated oxygen sensor 2, heater circuit malfunction)
^
P0171 (Fuel system too lean)
^
P0300 (Random misfire detected)
^
P0301 (No.1 cylinder misfire detected)
^
P0302 (No.2 cylinder misfire detected)
^
P0303 (No.3 cylinder misfire detected)
^
P0304 (No.4 cylinder misfire detected)
^
P0401 (Insufficient EGR flow detected)
^
P1491 (Insufficient EGR valve lift detected)
PROBABLE CAUSE
Carbon build-up may be restricting the EGR ports in the intake manifold runners.
CORRECTIVE ACTION
Clean the carbon out of the EGR ports.
PARTS INFORMATION
EGR port plugs (four to six required per vehicle):
P/N 17199-PT3-AHM
REQUIRED SPECIAL TOOLS
EGR Plug Replacement Kit: P/N 07WAZ-001000A (Includes slide hammer, 10-24 threaded screw, No. 25 drill bit, 10-24 tap, and 30 replacement plugs)
This kit is available for purchase through normal parts ordering. It's also available for loan through the Special Tool Loan Program. For details, refer
to Service Bulletin 98-051, Special Tool Loan Program.
*For replacement kit items:
Slide Hammer (dent puller type) - OTC P/N 898A
(Call OTC, 507-455-1480, for a local distributor)
