Technical Service Bulletins (TSBs) for the 2018 Clarity Plug-In Hybrid are official communications between Honda & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

    STEERING

    • TSB #A15060D

      Date Announced:
      AUG 03, 2017
      NHTSA ID:
      #10115757

      Service news article - To prevent damage during shipping, leather-wrapped steering wheels come with a protective plastic covering. Read More »

    STEERING: STEERING WHEEL/HANDLE BAR

    • TSB #A15060D

      Date Announced:
      AUG 03, 2017
      NHTSA ID:
      #10115757

      Service news article - To prevent damage during shipping, leather-wrapped steering wheels come with a protective plastic covering. Read More »

    ENGINE AND ENGINE COOLING

    • TSB #A21-008

      Date Announced:
      FEB 11, 2021
      NHTSA ID:
      #10187007

      Service Bulletin - The Hybrid System Failure message comes on the MID, and DTC P1D8D (Generator Motor Inverter Short) is stored. Read More »

    • TSB #A18-090

      Date Announced:
      OCT 17, 2019
      NHTSA ID:
      #10166784

      Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve ... Read More »

    • TSB #ONL6SV03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156632

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there is a software problem in the climate control unit when running the heater, which may turn the malfunction indicator light on. Read More »

    • TSB #ONL6VT03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156633

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there may be a software problem in the powertrain control module (PCM), causing a malfunction indicator light to come on and store one or more diagnostic trouble codes (DTCs). Read More »

    FUEL SYSTEM, GASOLINE

    • TSB #ONL6PH09152022

      Date Announced:
      SEP 15, 2022
      NHTSA ID:
      #10220360

      Owner's Notification Letter - Our records indicate that a PRODUCT UPDATE has not been completed on this vehicle (Vehicle Identification Number [VIN NUMBER]). Read More »

    POWER TRAIN

    • TSB #A18-090

      Date Announced:
      NOV 14, 2023
      NHTSA ID:
      #10245549

      Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve ... Read More »

    • TSB #ONL6VT03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156633

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there may be a software problem in the powertrain control module (PCM), causing a malfunction indicator light to come on and store one or more diagnostic trouble codes (DTCs). Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

    • TSB #A21-008

      Date Announced:
      FEB 11, 2021
      NHTSA ID:
      #10187007

      Service Bulletin - The Hybrid System Failure message comes on the MID, and DTC P1D8D (Generator Motor Inverter Short) is stored. Read More »

    • TSB #A18-079

      Date Announced:
      JUL 10, 2018
      NHTSA ID:
      #10143164

      Service bulletin - The MIL comes on with DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). Read More »

    ELECTRICAL SYSTEM

    • TSB #A18-090

      Date Announced:
      NOV 14, 2023
      NHTSA ID:
      #10245549

      Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve ... Read More »

    • TSB #ONL6PH09152022

      Date Announced:
      SEP 15, 2022
      NHTSA ID:
      #10220360

      Owner's Notification Letter - Our records indicate that a PRODUCT UPDATE has not been completed on this vehicle (Vehicle Identification Number [VIN NUMBER]). Read More »

    • TSB #A21-008

      Date Announced:
      FEB 11, 2021
      NHTSA ID:
      #10187007

      Service Bulletin - The Hybrid System Failure message comes on the MID, and DTC P1D8D (Generator Motor Inverter Short) is stored. Read More »

    • TSB #A18-090

      Date Announced:
      OCT 17, 2019
      NHTSA ID:
      #10166784

      Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve ... Read More »

    • TSB #APOC06272019

      Date Announced:
      JUN 27, 2019
      NHTSA ID:
      #10162001

      Dealer Message - On October 4, 2018, American Honda announced several Product Update Campaigns for certain 2018 Honda Clarity Plug-In Hybrid (PHEV) models. Read More »

    • TSB #ONL6CW03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156630

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, the warranty information CD that was placed in the vehicle during vehicle assembly did not list the correct warranty coverage for the state of Oregon. Read More »

    • TSB #ONL6PH03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156631

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there is a software error in the miles per gallon calculation, which affects the HV range display and causes it to read unusually high. Read More »

    • TSB #A18-097

      Date Announced:
      MAR 12, 2019
      NHTSA ID:
      #10154940

      Service Bulletin - 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. Read More »

    • TSB #A18-097

      Date Announced:
      OCT 27, 2018
      NHTSA ID:
      #10147178

      Service bulletin - 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. Read More »

    • TSB #ATS 180503

      Date Announced:
      MAY 09, 2018
      NHTSA ID:
      #10142623

      Tech line summary article - We're getting reports of the HV range shown in the driver information interface reading unusually high (more than 1,000 miles remaining). Read More »

    ELECTRICAL SYSTEM:12V/24V/48V BATTERY

    • TSB #A18-097

      Date Announced:
      MAR 12, 2019
      NHTSA ID:
      #10154940

      Service Bulletin - 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. Read More »

    ELECTRICAL SYSTEM:SOFTWARE

    • TSB #A18-079

      Date Announced:
      JUL 10, 2018
      NHTSA ID:
      #10143164

      Service bulletin - The MIL comes on with DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). Read More »

    • TSB #A18-079

      Date Announced:
      JUL 10, 2018
      NHTSA ID:
      #10143337

      Service bulletin - The MIL comes on with DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). Read More »

    VISIBILITY

    • TSB #ONLO9V07062021

      Date Announced:
      JUL 06, 2021
      NHTSA ID:
      #10199344

      Owner Notification Letter - On some 2018-21 Clarity Plug-In Hybrid models, the A/C condenser may leak refrigerant. Read More »

    • TSB #A21-017

      Date Announced:
      MAY 28, 2021
      NHTSA ID:
      #10194957

      Service Bulletin - American Honda is extending the warranty on the A/C condenser to 10 years from the original date of purchase with unlimited miles. Read More »

    • TSB #ABOM05282021

      Date Announced:
      MAY 28, 2021
      NHTSA ID:
      #10194978

      Dealer Message - Today, May 28, 2021, American Honda is announcing a warranty extension for certain 2018-2020 Accord and Accord Hybrid, 2018-2020 Civic, 2017-2021 Civic Hatch, 2017-2021 Civic Type R, 2018-2021 Clarity PHEV, and 2019-2021 ... Read More »

    • TSB #A18-090

      Date Announced:
      OCT 17, 2019
      NHTSA ID:
      #10166784

      Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve ... Read More »

    • TSB #APOC06272019

      Date Announced:
      JUN 27, 2019
      NHTSA ID:
      #10162001

      Dealer Message - On October 4, 2018, American Honda announced several Product Update Campaigns for certain 2018 Honda Clarity Plug-In Hybrid (PHEV) models. Read More »

    • TSB #ONL6PH03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156631

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there is a software error in the miles per gallon calculation, which affects the HV range display and causes it to read unusually high. Read More »

    • TSB #ONL6SV03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156632

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there is a software problem in the climate control unit when running the heater, which may turn the malfunction indicator light on. Read More »

    • TSB #ONL6VT03262019

      Date Announced:
      MAR 26, 2019
      NHTSA ID:
      #10156633

      Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there may be a software problem in the powertrain control module (PCM), causing a malfunction indicator light to come on and store one or more diagnostic trouble codes (DTCs). Read More »