Engine Controls - MIL ON/DTC P0171 Is Set
06-039July 15, 2011
Applies To:
2005 Accord Hybrid - ALL
MIL Is On With DTC P0171
(Supersedes 06-039, dated September 1, 2006, to revise the information marked by asterisks)
*REVISION SUMMARY
Under WARRANTY CLAIM INFORMATION, the flat rate time was changed because the MVCI updates control modules more efficiently.*
SYMPTOM
The MIL is on with PGM-FI DTC P0171 (rear bank [bank 1] fuel system too lean).
PROBABLE CAUSE
An incorrect PCM calculation indicates a lean condition for fuel bank 1.
NOTE:
The fuel management system and its components are working correctly, and no problem(s) exist; however, the PCM calculation error typically occurs with these factors:
^ Using 10 percent ethanol fuel
^ Driving at high elevation (above 3,000 feet)
^ Driving during hot weather conditions
^ Valve adjustment that's set to the loose side of the specification
CORRECTIVE ACTION
Use the HDS with software version 2.005.008 (or later) to update the PCM PGM-FI software.
SOFTWARE INFORMATION
WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies.
Operation Number: 125517
*Flat Rate Time: 0.2 hour*
Failed Part: P/N 37820-RCJ-A56
H/C 7995269
Defect Code: 03214
Symptom Code: 03203
Template ID: 06-039A
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.
REPAIR PROCEDURE
1. Update the PCM PGM-FI software using HDS software version 2.005.008 or later (refer to Service Bulletin 01-023, Updating Control Units/Modules).
2. Verify the vehicle is repaired by using the HDS PGM-FI data list to monitor the bank 1ST (short time) fuel trim.
^ If the bank 1ST fuel trim stays consistently below 1.16 (16 percent lean), the vehicle is repaired.
^ If the bank 1ST fuel trim stays equal to or greater than 1.16, then continue with normal troubleshooting.
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