Service Bulletin

25-017

June 23, 2026

Version 2

2023–24 Accord Hybrid & CR-V Hybrid PGM-FI Software Update
(DTC P0700)
Supersedes Version 1 to revise the information at:
 Under CORECTIVE ACTION, the information has been updated.
 Under SOFTWARE INFORMATION, the information has been updated
APPLIES TOP
Year

Model

Trim Level

VIN Range

2023–24

Accord Hybrid

ALL

ALL

2023–24

CR-V Hybrid

ALL

ALL

SYMPTOM
A slight engine vibration and the Malfunction Indicator Lamp (MIL) is ON with DTC P0700 (Transmission Control System
MIL Request) set during start-up in below freezing temperatures.
POSSIBLE CAUSE
In temperatures below freezing, ice formation under the exhaust valve can cause a vibration on start-up, setting DTC
P0700.
CORRECTIVE ACTION
Perform an ALL DTC CHECK with i-HDS to confirm that DTC P0700 is stored. If P0700 is stored, review the value for the
IAT Sensor 1 in the DTC Freeze Frame Data:


If the ECT Sensor 2 value is at or below freezing temperature, perform the software update.



If the ECT Sensor 2 value is above freezing temperature, this bulletin does not apply. Proceed with normal
troubleshooting.

WARRANTY CLAIM INFORMATION
Operation
Number

Description

Flat Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

P1255D8

Accord Hybrid: Update
the PGM-FI Software
(includes DTC clear).

0.2 hr

03265

03217

A25017A

37805-6NH-A57

1255D8

CR-V Hybrid: Update
the PGM-FI Software
(includes DTC clear).

0.2 hr

03265

03217

A25017B

37805-69F-AY1

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.

© 2026 American Honda Motor Co., Inc. – All Rights Reserved

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TOOL INFORMATION
Tool Name

Quantity

iHDS and Honda approved VCI

1

Midtronics GR8-110P AST, or Midtronics DCA-8000 Dynamic Diagnostic Charging System, or
Associated Equipment Corporation ESS6100 100A Smart Charger

1

SOFTWARE INFORMATION
NOTE:
 Unnecessary or incorrect repairs resulting from a failure to update the diagnostic and reprogramming software are not
covered under warranty.
 Before beginning the repair, make sure all diagnostic and reprogramming software are updated as listed.
1.010.011 or later
3.105.036 or later
4.7.0.0 or later

i-HDS Software Version
HDS Software Version
Honda ECU Reprogramming

For more information about updating vehicle systems, refer to service bulletin 22-100, Updating Control Units/Modules
with the Honda ECU Reprogramming Application.
Do not use the MongoosePRO VCI for this service bulletin as it is not an American Honda approved device.
Honda ECU Reprogramming Information:
Year

2023–24

2023–24

Model

Accord Hybrid

CR-V Hybrid

System

PGM-FI

PGM-FI

Trim Level

ALL

ALL

Old Program ID

Program ID (or later)

37805-6NH-A570

37805-6NH-A580

37805-6NH-AY10

37805-6NH-AY20

37805-6NH-AZ10

37805-6NH-AZ20

37805-69F-AY10

37805-69F-AY20

37805-69F-AZ10

37805-69F-AZ20

37805-69F-A540

37805-69F-A550

SOFTWARE UPDATE PROCEDURE
NOTE:









Make sure the 12-volt battery is fully charged before starting an update.
Connect the Midtronics GR8-110P AST in Power Supply Mode, or the Midtronics DCA-8000 Dynamic Diagnostic
Charging System in Reflash Mode, or the Associated Equipment Corporation ESS 6100 100A Smart Charger in
Power Supply Mode | DIAG+, directly to the vehicle’s 12-volt battery. Leave it connected during the entire procedure
to maintain a steady voltage.
Do not use a lithium-ion jump pack to supply power due to the pulses of high amperage that do not provide
consistent power to the battery during reprogramming.
If the vehicle’s 12-volt battery drops below 10 volts during the update, the programming status bar may not present
accurately, or the Honda ECU Reprogramming application may display an error message.
Control module failure caused by the improper completion of a software update (early key cycle, low battery
voltage, disconnected DLC cable, etc.) is not covered by warranty.
If an error occurs during the update or the i-HDS freezes, do not disconnect the battery or turn the ignition to OFF.
Reboot the i-HDS and start over.
To prevent control unit damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power
windows, door locks, etc.) during the update.

1. Do an ALL DTC Check. Note any DTCs and then do an ALL DTC Clear.
2. Update the PGM-FI software, see service bulletin 22-100, Updating Control Units/Modules with the Honda ECU
Reprogramming Application.
3. Do an ALL DTC Check and clear any codes that may have set during the update.
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