Engine Controls - Oil Consumption, MIL, DTC P3400/P3497

11-033

April 17, 2013

Applies To:
See VEHICLES AFFECTED

Engine Oil Consumption; MIL May Be On With DTC P3400 and/or P3497
(Supersedes 11-033, dated August 2, 2012, to revise the information marked by the black bars and asterisks)

*REVISION SUMMARY

^ Under VEHICLES AFFECTED, some 2011 Accords were added.

^ A DIAGNOSIS procedure was added.*

SYMPTOM

The engine oil level is low on the dipstick, and the MIL may be on with DTC P3400 and/or P3497 (VPS Stuck Off Bank 1/Bank 2).

PROBABLE CAUSE

The VCM (variable cylinder management) function may
repeatedly switch on and off during certain light throttle
operation, at cruising speeds, on flat roads. This
frequent switching can contribute to increased oil
consumption. The updated PCM software improves
VCM timing during very light throttle operation which
may reduce oil consumption.

DTCs P3400 and P3497 occur when the oil level drops
to a point where line pressure can no longer support
continued VCM operation.








VEHICLES AFFECTED

CORRECTIVE ACTION

Update the PGM-FI software.

Service Advisor:
Talk to the customer about the many factors
contributing to oil consumption. This software update
should have a positive impact where the customer
drives frequently at small throttle openings, at cruising
speeds, on flat roads. However, this is just one of many
factors contributing to overall oil consumption,
including engine braking, frequency of use, trailer
towing, etc.

Remind customers that with less frequent service
intervals for modern engines, its not uncommon for a
customer to add oil between services. Therefore, its a
good idea for customers to check their engine oil
regularly (as recommended in the Owners Manual)
and add oil as necessary.

SOFTWARE INFORMATION

Accord, Accord Crosstour, 2008-10 Odyssey
HDS Software Version:
2.024.009 or later
HDS Control Module (CM) Update:
Database Update 29-NOV-2010 or later

Pilot, 2011 Odyssey
HDS Software Version:
2.024.011 or later
HDS Control Module (CM) Update:
Database Update 28-DEC-2010 or later





The updated PGM-FI software program IDs and P/Ns
are listed below. If the HDS or MVCI is loaded with the
latest software, and it displays No Update Needed
during the update, the software for this service bulletin
is already installed.

WARRANTY CLAIM INFORMATION

The normal warranty applies.

Operation Number: 125517

Flat Rate Time: 0.2 hour

Failed Part: P/N 37820-R70-A74

Defect Code: 03214

Symptom Code: 03203

Skill Level: Repair Technician

*DIAGNOSIS

1. Check if the MIL is on.

^ If the MIL is on, go to Step 2.

^ If the MIL is not on, go to REPAIR PROCEDURE.

2. Check for DTCS with the HDS.

^ If DTC P3400 and/or P3497 is stored, go to step 3.

^ If there are any other DTCs stored, this bulletin does not apply, continue with normal troubleshooting.

3. Check the engine oil level on the dipstick.

^ If the engine oil level is below the end of the dipstick (there is no oil on the dipstick), go to REPAIR PROCEDURE.

^ If the engine oil level is on the dipstick (it may be low, but there is oil on the dipstick), go to Service Bulletin 13-031, MIL Comes On With DTC P3400 and/or P3497.*

REPAIR PROCEDURE

Update the PGM-FI software. Refer to Service Bulletin
01-023, Updating Control Units/Modules.





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