Service Bulletin
October 1, 2015

15-057
02271 Version 2

Safety Recall: HV Cell Voltage Sensor (CVS) Software
Supersedes 15-057, Product Update: HV Cell Voltage Sensor (CVS) Software dated September 4, 2015;
see REVISION SUMMARY
AFFECTED VEHICLES
Year
Model
2014–15
Accord Hybrid

Trim
ALL

VIN Range
Check the iN VIN statues for eligibility

REVISION SUMMARY
This bulletin changed from a product update to a safety recall.
BACKGROUND
The cell voltage sensor may incorrectly interpret electrical noise from the inverter and motor circuits as a problem and
cause the vehicle to switch to a fail-safe EV mode. Additionally, DTCs P0B3B, high voltage battery cell voltage sensor
internal circuit malfunction and P0DA8, motor power inverter module voltage malfunction are often stored.
If the vehicle switches to fail-safe EV mode while cruising at highway speed, the engine shuts off and the vehicle will
experience a sudden loss of power as the fail-safe EV mode limits vehicle speed to a maximum of about 40 mph. If this
occurs, the vehicle may be able to travel for up to 2 miles in fail-safe EV mode, at which time the HV battery will likely
fully discharge. If the battery completely discharges while the vehicle is still in operation, the vehicle will stall, increasing
the risk of a crash.
CUSTOMER NOTIFICATION
Owners of affected vehicles will be sent a notification of this campaign.
Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.
Some vehicles affected by this campaign may be in your used vehicle inventory. These vehicles must be repaired
before they are sold.
Should your dealership sell an unrepaired vehicle that subsequently causes injury or damage because of the recalled
item, the dealership will be solely responsible to the damaged party, and will be required to defend and indemnify
American Honda for any resulting claims. To see if a vehicle in inventory is affected by this recall, do a VIN status
inquiry before selling it.
CORRECTIVE ACTION
Do the inspection and based on your results, update the vehicle or replace the HV battery.

Page 1 of 3
CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools,
equipment, and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you
should not assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Honda automobile dealer.

© 2015 American Honda Motor Co., Inc. – All Rights Reserved

SOFTWARE INFORMATION
NOTE: Unnecessary or incorrect repairs resulting from a failure to update the HDS or MVCI are not covered under
warranty.
MVCI Control Module (CM) Update:
Application (FW) Version 3.01.42 or later
Database Update 04-AUG-2015 or later
HDS Software Version:
3.016.042 or later
Before beginning the repair, make sure that both the HDS and the MVCI are updated as listed above.
Do only the update listed in this service bulletin.
Check that the MVCI indicates the applicable program ID listed below (or a later program ID) as the Available Update
when the update begins. If the MVCI displays This vehicle does not need an update at this time during the update,
the software for this service bulletin is already installed.
For more information about updating the HDS, the MVCI, and vehicle systems, refer to Service Bulletin 01-023,
Updating Control Units/Modules.
Year/Model
2014–15 Accord Hybrid

Program ID

Program Part number
1K411-5K1-A02

K1A020

WARRANTY CLAIM INFORMATION
Operation
Number

Description

Flat Rate
Time

Template
ID

Defect
Code

Symptom
Code

Failed Part Number

1185B0

Do the inspection and
update the CVS software.
(No DTCs)

0.2 hr

15-057A

5ZF00

JT700

1K410-5K1-A03

1185B1

Do the inspection and
update the CVS software.
DTC and error codes
were set, but they were
cleared and the CVS
software updated.

0.5 hr

15-057B

5ZF00

JT700

1K410-5K1-A03

1185B2

Do the inspection and the
result was to replace the
battery. File a separate
warranty claim under
normal warranty for
replacing the HV
battery.

0.5 hr

15-057C

5ZF00

JT700

1K410-5K1-A03

Skill Level:

Repair Technician

Page 2 of 3

INSPECTION AND UPDATE PROCEDURE
1. Connect the HDS and check for DTCs.
•
•

If DTC P0B3B or P0DA8 is not set, go to step 4.
If DTC P0B3B and/or P0DA8 is set, do not clear the DTC(s). Save all the freeze data, then go to step 2.

2. Do the HV Battery Diagnosis. Refer to the job aid New Procedures for Servicing the High Voltage Battery.
NOTE: The diagnosis displays the HV battery cell voltage failure information for sensor A, sensor B, and sensor C.
The errors are 8 digits and appear as a series of 0s and 1s.
3. Check the list for the following failures:
NOTE: The error codes in each failure series can be in any order as long as all the codes in each row are present in
the HV battery diagnosis.
Error Code Failure Series 1

00010000

00010000

00010000

Error Code Failure Series 2

00010000

00010000

00000000

Error Code Failure Series 3

00010000

00010000

00010100

Error Code Failure Series 4

00010000

00000000

00000000

Error Code Failure Series 5

00010000

00010100

00010100

Error Code Failure Series 6
00010000
00010100
00000000
• If any one of the six error code failure series appears, write down the failure codes on the RO before
clearing all set codes, then go to step 4.
• If none of the six error code failure series appears, write down any other the failure code(s) that may be
stored on the RO. Save the HDS freeze data and the Cell Voltage Sensor Check data, then replace the HV
battery. Refer to service information. You will need to file a separate warranty claim under normal warranty
for replacing the HV battery.
4. Update the CVS software with the MVCI. Refer to Service Bulletin 01-023, Updating Control Units/Modules. This
product update is complete.
END

Page 3 of 3