service indicator HONDA CLARITY PLUG-IN 2021 Owner's Manual (in English)
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Quick Reference Guide
Handling the Unexpected (P 527)
Flat Tire (P 528)
●Park in a safe location and repair the flat 
tire using the temporary tire repair kit.
Indicators Come On 
(P 551)
●Identify the indicator and consult the 
owner’s manual.
Power System Won’t Start 
(P 541)
●If the 12-volt battery is dead, jump start 
using a booster battery.
Blown Fuse 
 
(P 559)
●Check for a blown fuse if an electrical 
device does not operate.
Overheating (P 548)
●Park in a safe location. If you do not see 
steam under the hood, open the hood, 
and let the power system cool down.
Emergency Towing 
(P 567)
●Call a professional towing service if you 
need to tow your vehicle.
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uuIndicators uDriver Information Interface Wa rning and Information Messages
Continued
Instrument Panel
Driver Information Interface Warning and Information Messages
The following messages appear only on the dr iver information interface. Press the   (display/information) button to see the message 
again with the system message indicator on.
MessageConditionExplanation
●Appears when the vehicle cannot be driven.●Immediately stop in a safe place.
●Appears when the washer fluid gets low.●Refill the washer fluid.
2 Refilling Window Washer Fluid  P. 499
●Appears when the scheduled maintenance is due 
soon.
●Consequently, Service Due Now  and Service Past 
Due  follow.
2Warning Message and Maintenance Minder 
Information on the Driver Information Interface  
P. 482
●Appears as soon as a problem is detected in the 
smart entry system or push button starting system.●Appears constantly  - Have your vehicle checked by a 
dealer.
Canadian models
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457
Driving
Refueling
Fuel Information
■Fuel recommendation
Use of a lower octane gasoline can cause a  persistent, heavy metallic knocking noise 
that can lead to engine damage.
■Top tier detergent gasoline
Because the level of detergency and additive s in gasoline vary in the market, Honda 
endorses the use of “TOP TIER Detergent Gasoline” where available to help 
maintain the performance and reliability of your vehicle. TOP TIER Detergent 
Gasoline meets a new gasoline standard jointly established by leading automotive 
manufacturers to meet the needs of today’s advanced engines.
Qualifying gasoline retailers will, in most  cases, identify their gasoline as having met 
“TOP TIER Detergent Gasoline” standards  at the retail location. This fuel is 
guaranteed to contain the proper level of de tergent additives and be free of metallic 
additives. The proper level of detergent ad ditives, and absence of harmful metallic 
additives in gasoline, help avoid build-up of deposits in your engine and emission 
control system. 
For further important fuel-related information for your vehicle, or on information on 
gasoline that does not contain MMT, visit  www.hondacars.com. In Canada, visit 
www.honda.ca  for additional information on gaso line. For more information on top 
tier gasoline, visit  www.toptiergas.com .
■Fuel tank capacity: 7. 0 US gal (26.5 liters)
Unleaded gasoline, pump octane number 87 or higher
1Fuel Information
NOTICE
We recommend quality ga soline containing 
detergent additives that help  prevent fuel system and 
engine deposits. In  addition, in order to maintain 
good performance, fuel economy, and emissions 
control, we strongly reco mmend the use of gasoline 
that does NOT contain  harmful manganese-based 
fuel additives such as MMT, if such gasoline is 
available.
Use of gasoline with these additives may adversely 
affect performance, a nd cause the malfunction 
indicator lamp on your inst rument panel to come on. 
If this happens, contact a dealer for service.
Some gasoline today is blended with oxygenates such 
as ethanol. Your vehicle is designed to operate on 
oxygenated gasoline containing up to 15% ethanol 
by volume. Do not use gaso line containing methanol. 
If you notice any undesira ble operating symptoms, try 
another service station or sw itch to another brand of 
gasoline.
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477
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 478
Safety When Performing Maintenance ..479Parts and Fluids Used in Maintenance Service ........................................... 480
Maintenance Minder
TM..................... 481
Maintenance Under the Hood Maintenance Items Under the Hood .. 486
Opening the Hood ........................... 487
Recommended Engine Oil ................ 488
Oil Check ......................................... 489
Adding Engine Oil ............................ 490
Changing the Engine Oil and Oil Filter ...491 Engine Coolant ................................ 494
Cooling System ................................ 496
Transmission Fluid ............................ 498
Brake Fluid ....................................... 498
Refilling Window Washer Fluid......... 499
Replacing Light Bulbs ....................... 500Checking and Maintaining Wiper 
Blades .......................................... 502
Checking and Maintaining Tires
Checking Tires ................................. 505
Tire and Loading Information Label .. 506
Tire Labeling .................................... 506
DOT Tire Quality Grading (U.S. Vehicles).. 508
Wear Indicators ............................... 510
Tire Service Life ................................ 510
Tire and Wheel Replacement ........... 511
Tire Rotation .................................... 512
Winter Tires ..................................... 513
12-Volt Battery ................................. 514
Remote Transmitter Care Replacing the Button Battery ........... 516
Climate Control System Maintenance.. 517CleaningInterior Care .................................... 519
Exterior Care.................................... 521
Accessories and Modifications ........ 525
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482
uuMaintenance MinderTMuTo Use Maintenance MinderTM
Maintenance
The system message indicator ( ) comes on along with the Maintenance Minder message.
■Warning Message and Maintenance Minder Information on 
the Driver Information Interface
Warning MessageMaintenance Minder 
InformationExplanationInformation
Service Due SoonOne or more of the service items are 
required in less than 30 days. Press the   button to switch to another 
display.The remaining days will be 
counted down per day.
Service Due NowOne or more of the service items are 
required in less than 10 days. Press the   button to switch to another 
display.Have the indicated service 
performed as soon as 
possible.
Service Past DueThe indicated maintenance service is 
still not done after the remaining time 
reaches 0. Press the   button to 
switch to another display.Your vehicle has passed the 
service required point.
Immediately have the service 
performed and make sure to 
reset the Maintenance 
Minder
TM.
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uuMaintenance MinderTMuTo Use Maintenance MinderTM
Continued
Maintenance
■Maintenance Service Items1Maintenance Service Items
•Adjust the valves during services A, 0, 1, 2, or 3 if 
they are noisy.
Maintenance Minder Message
System Message 
Indicator
Sub Items
Main Item
U.S. models
*1: If a Maintenance Minder message does not appear more than 12 months after the display is reset, 
change the engine oil every year.
# : See information on maintenance and emissions warranty.
CODEMaintenance Main Items
A
●Replace engine oil*1 and oil filter
0●Inspect front and rear brakes●Check expiration date for Temporary Tire Repair Kit●Inspect these items: • Tie rod ends, steering gearbox, and boots
• Suspension components
• Driveshaft boots
• Brake hoses and lines  (including ABS/VSA®)
• All fluid levels and condition of fluids
• Exhaust system
#
•Fuel lines and connections#
•Stay RR, RR Subframe
• Under body battery cover
*2: If you drive primarily in urban areas that have high concentrations of soot in the air from industry and 
from diesel-powered vehicles, replace the dust and pollen filter every 15,000 miles (24,000 km).
*3: Driving in mountainous areas at very low vehicle speeds results in higher transmission temperatures. 
This requires transmission fluid changes more frequently than recommended by the Maintenance 
Minder. If you regularly drive your vehicle under these conditions, have the transmission fluid changed 
every 47,500 miles (75,000 km) or 3 years.
*4: If a Maintenance Minder message does not appear more than 36 months after the display for item 7 is  reset, change the brake fluid every 3 years.
*5: If you drive in dusty conditions, replace the air cleaner element every 15,000 miles (24,000 km).
CODEMaintenance Sub Items
1
●Rotate tires
2●Replace dust and pollen filter*2
3●Replace transmission fluid*3
4●Replace spark plugs●Inspect valve clearance
5
●Replace engine coolant
7●Replace brake fluid*4
8●Replace air cleaner element*5
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uuChecking and Maintaining Tires uWear Indicators
Maintenance
Wear Indicators
The groove where the wear indicator is 
located is 1/16 inch (1.6 mm) shallower than 
elsewhere on the tire. If the tread has worn so 
that the indicator is ex posed, replace the tire. 
Worn out tires have poor traction on wet 
roads.
Tire Service Life
The life of your tires is dependent on many factors, including driving habits, road 
conditions, vehicle loading, inflation pre ssure, maintenance history, speed, and 
environmental conditions (even when the tires are not in use).
In addition to regular in spections and inflation pres sure maintenance, it is 
recommended that you have annual inspecti ons performed once the tires reach five 
years old. All tires should be removed fro m service after 10 years from the date of 
manufacture, regardless of their condition or state of wear.
Example of a Wear 
Indicator mark
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uuIf the 12-Volt Battery Is Dead u
Handling the Unexpected
Once your vehicle’s power system has started, remove the jumper cables in the 
following order:
1.Disconnect the jumper cable from your vehicle’s ground.
2. Disconnect the other end of the jump er cable from the booster battery - 
terminal.
3. Disconnect the jumper cable from  your vehicle’s 12-volt battery + terminal.
4. Disconnect the other end of the jump er cable from the booster battery + 
terminal.
Have your vehicle inspected by a n earby service station or a dealer.
■What to Do After the Power System Starts1What to Do After the Power System Starts
The indicators for the Vehicle Stability Assist
TM (VSA ®) 
system, VSA ® OFF, Collision Mitigation Braking 
System
TM (CMBSTM), and low tire pressure/Tire 
Pressure Monitoring System (TPMS) may come on 
along with a message in the driver information 
interface when you turn the power system on after 
reconnecting the battery.
Drive a short distance at 12 mph (20 km/h). The 
indicator should go off. If  it does not, have your 
vehicle checked by a dealer.
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uuIndicator, Coming On/BlinkinguIf the Transmission System Indicator Blinks along with the Warning Message
Handling the Unexpected
If the Transmission System Indicator Blinks along 
with the Warning Message
■Reasons for the indicator to blink
The transmission is malfunctioning.
■What to do when the indicator blinks
• Immediately have your vehicle inspected by 
a dealer.
• Change the gear position to 
(N when you 
turn the power system on.
u Check if the 
(N position in the 
instrument panel and the indicator on 
the 
(N button light/blink.
u The power system cannot be turned on 
unless the parking brake is set.
2 Turning on the Power  P. 380
1If the Transmission System In dicator Blinks along with the 
Warning Message
You may not be able to turn on the power system.
Make sure to set the parking brake when parking 
your vehicle.
Call a professional  towing service if you need to tow 
your vehicle. 2 Emergency Towing  P. 567
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Index
Collision Mitigation Braking SystemTM 
(CMBSTM) .................................................  445
Console Compartment .............................  188
Control Box ..............................................  467
Controls ....................................................  137
Coolant (Engine) ......................................  494
Adding to the Radiator ...........................  495
Adding to the Reserve Tank ....................  494
Overheating ............................................  548
Coolant (High Voltage Battery and  Inverter) ..................................................  496
Creeping (Transmission) ..........................  385
Cup Holders ..............................................  189
Customer Service Information ................  583
Customized Features .......................  135, 308
D
Daytime Running Lights ..........................  167
Dead Battery (12-Volt) .............................  545
Deceleration Paddle Selector ..................  394
Deceleration Paddl e Selector Indicator.......  93
Defrosting the Windshield and  Windows .................................................  199
Devices that Emit Radio Waves ...............  575
Dimming Headlights ..............................................  164
Rearview Mirror ......................................  175
Dipstick (Engine Oil) ................................  489
Directional Signals (Turn Signal) .............  163
Display Button ..........................................  213 Door Mirrors
.............................................  176
Doors .........................................................  139
Auto Door Locking ..................................  151
Auto Door Unlocking ...............................  151
Door Open Message ..................................  46
Keys ........................................................  139
Locking/Unlocking the Doors from the  Inside...............................................  25, 148
Locking/Unlocking the Doors from the  Outside..................................................  141
Lockout Prevention System ......................  147
DOT Tire Quality Grading ........................  508
Drive Cycle Score/Lifetime Points ............  133
Driver Information Interface ...................  126
Driver’s Knee Airbag ..................................  62
Driving .......................................................  373
Braking ....................................................  437
Shifting Gear ...........................................  386
Transmission ............................................  385
Turning on the Power ..............................  380
Driving Position Memory System .............  172
Dust and Pollen Filter ...............................  518
E
Eco Assist® System ......................................  20
Eco Drive Display ......................................  132
ECON Mode ..............................................  392
Elapsed Time .............................................  129
Electric Power Steering (EPS) System
Indicator ....................................................  96 Electronic Stability Control (ESC)
.............  428
Emergency ................................................  567
Emissions Testing (Readiness Codes) .......  577
Energy Flow Screen ..................................  217
Engine
Coolant ...................................................  494
If the 12-Volt Battery Is Dead...................  545
Oil ...........................................................  488
Engine Coolant .........................................  494
Adding to the Radiator ............................  495
Adding to the Reserve Tank.....................  494
Overheating ............................................  548
Engine Oil .................................................  488
Adding ....................................................  490
Checking.................................................  489
Recommended Engine Oil .......................  488
EPS (Electric Power Steering) System ........  96
EV Indicator ................................................  91
Exhaust Gas Hazard (Carbon Monoxide) ..  84
Exterior Care (Cleaning) ...........................  521
Exterior Mirrors ........................................  176
F
Features....................................................  205
Filters Dust and Pollen .......................................  518
Oil ...........................................................  491
Flat Tire .....................................................  528
Floor Mats .................................................  520
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