This is indeed a known issue, and seems to be reported more with Chargepoint equipment than other manufacturers.
There is a service bulletin with a software update to address this issue. In the US it is:
Service Bulletin 18-097
September 20, 2018 Version 1
Clarity Fails To Charge or Finish Charging
Year Model Trim VIN Range
2018 Clarity Plug-in
2018 Clarity Electric ALL ALL
The Clarity Plug-In Hybrid and Clarity Electric may not start charging when plugged in or may stop charging before the
high-voltage lithium-ion battery is full.
The battery charger software does not start charging or may stop before charging is complete in areas with poor or
fluctuating power quality.
Update the battery charger software to the latest version.
Once the update is completed, the vehicle may take up to one and a half times longer to fully charge. This depends on
the power quality in the area, which will affect the charging rate.
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Description Flat Rate
Failed Part Number
1255D8 Update the battery
0.2 hr 03214 03217 A18097A 1C601-5WP-A01
Skill Level: Repair Technician
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.
© 2018 American Honda Motor Co., Inc. — All Rights Reserved Page 1 of 2
Part Name Order Part Number Quantity
Battery Charger Software 1C601-5WP-A02 1
This issue might set one or more of the following DTCs:
• DTC P0D28 (battery charger input voltage too high)
• DTC P0D2A: (battery charger input voltage too high)
• DTC P0D3D: (battery charger input voltage too high)
• Clarity Plug-In Hybrid: DTC P1D23 (battery charger temperature sensor circuit range/performance)
• Clarity Electric: DTC P1D22 (battery charger temperature sensor circuit malfunction)
Unnecessary or incorrect repairs resulting from a failure to update the i-HDS are not covered under warranty.
i-HDS Software Version: 1.004.037 or later
J2534 Software Information:
• PC Application Version 22.214.171.124. or later
• Database update 31-AUG-2018 or later
Before beginning the repair, make sure that both the i-HDS and J2534 software are updated as listed above.
Do only the update listed in this service bulletin.
You cannot apply the updates with the MVCI as a standalone tool. To update the software you must use the MVCI
or the DST-i interface in conjunction with the J2534 Rewrite PC application on the i-HDS.
For more information about updating the i-HDS, the MVCI, and vehicle systems, refer to Service Bulletin 01-023,
Updating Control Units/Modules.
Program ID (or later) Program P/N (or later)
2018 Clarity Plug-In Hybrid Battery
2018 Clarity Electric Battery
1. Update the battery charger software using the i-HDS J2534 rewrite software with the MVCI or DST-i. Refer to
Service Bulletin 01-023, Updating Control Units/Modules.
2. Clear any DTCs.
3. Verify that no codes are stored and the vehicle operates normally.
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Oregon Electric Vehicle Association Vice Chair
NDEW City Captain