2021 HONDA RIDGELINE fuel cap

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Quick Reference Guide
CMBSTM On and Off
(P429)
●When a possible frontal collision is likely
unavoidable, the CMBSTM can help you to
reduce the vehicle speed and the severity
of the collision.
●The CMBSTM is turned on every time you
start the engine.
●To turn the CMBSTM on or off, press and
hold the button until you hear a beep.
VSA ® On and Off (P413)
●The Vehicle Stability AssistTM (VSA® )
system helps stabilize the vehicle during
cornering, and helps maintain traction
while accelerating on loose or slippery
road surfaces.
●VSA ® comes on automatically every time
you start the engine.
●To partially disable or fully restore VSA®
function, press and ho ld the button until
you hear a beep.
Tire Pressure Monitoring System (TPMS) with Tire
Fill Assist
(P416, 560)
●The TPMS monitors tire pressure.●The TPMS is turned on automatically every time you start the engine.●The TPMS fill assist provides audible and visual guidance during tire pressure adjustment.
Refueling (P483)
aPress the fuel fill
door release button.
bAfter refueling,
wait for about five
seconds before
removing the filler
nozzle.
Fuel recommendation: Unleaded gaso line, pump octane number 87 or
higher
Fuel tank capacity: 19.5 US gal (73.8 L)

483
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 additives, 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 informati on for your vehicle, or on information on
gasoline that does not contain MMT, vi sit www.hondacars.com. In Canada, visit
www.honda.ca for additional information on gasoline. For more information on top
tier gasoline, visit www.toptiergas.com .
■Fuel tank capacity: 19.5 US gal (73.8 L)
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 ga soline containing methanol.
If you notice any undesira ble operating symptoms, try
another service station or sw itch to another brand of
gasoline.

484
uuRefueling uHow to Refuel
Driving
How to Refuel
Your fuel tank is not equipped with a fuel filler cap. You can insert the filler nozzle
directly into the filler neck. The tank seal s itself again when you pull out the filler
nozzle.
1.Stop your vehicle with the service station
pump on the left side of the vehicle in the
rear.
2. Turn off the engine.
3. Press the fuel fill door release button.
u The fuel fill door opens.1How to Refuel
The fuel filler opening is designed to accept only
service station filler nozzles for refueling. Use of
smaller diamet er tubes (e.g., those used to siphon
fuel for other uses) or other non-service station
devices can damage the area in and around the filler
opening.
The filler nozzle automatically stops to leave space in
the fuel tank so that fuel does not overflow as a result
of changes in air temperature.
Do not continue to add fuel after the filler nozzle has
automatically stopped. Addi tional fuel can exceed
the full tank capacity.
3WARNING
Gasoline is highly flammable and explosive.
You can be burned or seriously injured
when handling fuel.
• Stop the engine, and keep heat, sparks,
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Press

504
uuMaintenance Under the Hood uEngine Coolant
Maintenance
Engine Coolant
This coolant is premixed with 50% antifreeze and 50% water. Do not add any
straight antifreeze or water.
We recommend you check the engine coolant level every time you refuel. Check the
reserve tank first. If it is completely empty, also check the coolant level in the
radiator. Add the engine coolant accordingly.
1. Make sure the engine and radiator are cool.
2. Remove the engine compartment cover.
2 Engine Compartment Cover P. 498
3.Check the amount of coolant in the reserve
tank.
u If the coolant level is below the MIN
mark, add the specified coolant until it
reaches the MAX mark.
4. Inspect the cooling system for leaks.
Specified coolant: Honda Long Life Antifreeze/Coolant Type 2
■Reserve Tank
1Engine Coolant
NOTICE
Genuine Honda engine coolan t is a 50/50 mixture of
antifreeze and water that can withstand freezing at
temperatures as low as a bout -31°F (-35°C). If your
vehicle is consistently subjected to temperatures
below this, the concentration of antifreeze in the
coolant should be increased. Consult a dealer for
details.
If Honda antifreeze /coolant is not available, you may
use another major brand of non-silicate coolant as a
temporary replacement. Check that it is a high quality
coolant recommended for aluminum engines.
Continued use of any non-Honda coolant can result
in corrosion, causing the cooling system to
malfunction or fail. Have the cooling system flushed
and refilled with Honda antifreeze/coolant as soon as
possible.
Do not add rust inhibitors or other additives to your
vehicle’s cooling system. Th ey may not be compatible
with the coolant or with the engine components.
3WARNING
Removing the radiator cap while the
engine is hot can cause the coolant to spray
out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
MAX
MIN
Reserve Tank

531
uuCleaning uExterior Care
Continued
Maintenance
Exterior Care
Dust off the vehicle body after you drive.
Regularly inspect your vehicle for scratches on painted surfaces. A scratch on a
painted surface can result in body rust. If you find a scratch, promptly repair it.
Wash the vehicle regularly. Wash more fr equently when driving in the following
conditions:
• If driving on roads with road salt.
• If driving in coastal areas.
• If tar, soot, bird droppings, insects, or tree sap are stuck to painted surfaces.
Use a water and mild detergent solution, and
a soft brush or cloth to clean the inside of the
trunk.
To drain water from the trunk, remove the
drain plug by turning it counter-clockwise. u When you are finished washing the
trunk, dry it with a soft cloth, and
reinstall the drain plug.
■Washing the Vehicle
■Washing the Trunk
1Washing the Vehicle
Do not spray water into the air intake vents. It can
cause a malfunction.
Do not spray water onto the capless unit when the
fuel fill door is open. It ca n cause damage to the fuel
system or engine.
Air Intake Vents
Drain plug

574
Information
Specifications
■Vehicle Specifications
*1: Models with AWD
*2: Models with 2WD
■Air Conditioning
ModelRidgeline
No. of Passengers:
Front 2
Rear 3
Total 5
Weights:Gross Vehicle
Weight RatingSee the certification label
on the driver’s doorjamb
Gross Axle Weight
Rating (Front)See the certification label
on the driver’s doorjamb
Gross Axle Weight
Rating (Rear)See the certification label
on the driver’s doorjamb
Gross Combined Weight
Rating U.S.: 10,031 lbs (4,550 kg)
*1
8,245 lbs (3,740 kg)*2
Canada: 4,550 kg
Refrigerant TypeHFO-1234yf (R-1234yf)
Charge Quantity 21.3 – 23.1 oz (605 – 655 g)
Lubricant TypeRL85HM (POE)
Quantity 7.75 – 9.34 cu-in (127 – 153 cm3)
■ Engine Specifications
■ Fuel
■ Washer Fluid
Displacement211.8 cu-in (3,471 cm3)
Spark Plugs NGK DILZKR7B11G
TypeUnleaded gasoline, Pump octane number
of 87 or higher
Fuel Tank Capacity 19.5 US gal (73.8 L)
Tank CapacityU.S.: 1.0 US gal (3.8 L)
Canada: 1.4 US gal (5.3 L)
■ Light Bulbs
*1: Models with LED parking lights
*2: Models without LED parking lights
*3: Models with Truck Bed Audio System
*4: Models without Truck Bed Audio System
*5: Models with moonroof
*6: Models without moonroof
Headlights (Low Beam)LED
Headlights (High Beam) 60W (HB3)
Fog LightsLED
Front Turn Signal/Parking* Lights 28/8 W (Amber)Parking Lights*LED
Front Side Marker Lights LED
Daytime Running LightsLED*1
60W (HB3)*2
Side Turn Signal Lights (on Door Mirrors)*LEDBrake/Taillights/Rear Side Marker LightsLED
Back-Up Lights 21 W
Rear Turn Signal Lights21 W
High-Mount Brake Light LED
Rear License Plate Lights5 W
Bed Lights LED*3
5 W*4
Interior Lights
Front Map LightsLED*5
5 W*6
Rear Map Lights5 WVanity Mirror Lights*1.4 WDoor Pocket Lights*LEDBeverage Holder Light*LEDDoor Courtesy Lights*3.8 WDoor Inner Handle Lights*LEDConsole Compartment Light1.4 WGlove Box Light1.4 WFoot Lights*LED
* Not available on all models