2020 HONDA ACCORD SEDAN check engine

497
uuWhen Driving uVehicle Stability AssistTM (VSA ®), aka Electronic Stability Control (ESC), System
Driving
This button is on the driver side control panel.
To partially disable VSA ® functionality/features,
press and hold it until you hear a beep.
Your vehicle will have normal braking and
cornering ability, but tra ction control function
will be less effective.
To restore VSA ® functionality/features, press
the (VSA ® OFF ) button until you hear a
beep.
VSA ® is turned on every time you start the
engine, even if you turned it off the last time
you drove the vehicle.
■VSA ® On and Off1 Vehicle Stability AssistTM (VSA® ), aka Electronic Stability Control
(ESC), System
In certain unusual conditions when your vehicle gets
stuck in shallow mud or fr esh snow, it may be easier
to free it with the VSA ® temporarily switched off.
When the button is pressed, the traction control
function becomes less effective. This allows for the
wheels to spin more freely at low speed. You should
only attempt to free your vehicle with the VSA ® off if
you are not able to free it when the VSA ® is on.
Immediately after freeing your vehicle, be sure to
switch VSA ® on again. We do not recommend driving
your vehicle with the VSA ® system switched off.
You may hear a motor sound coming from the
engine compartment while system checks are being
performed immediately after starting the engine or
while driving. This is normal.
VSA ® OFF Indicator

uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
516
Driving
When you turn the CMBSTM on and off, do the
following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
u The message appears on the driver
information interface when the system
becomes on or off.
The CMBS
TM is turned on every time you start
the engine, even if you turned it off the last
time you drove the vehicle.
■CMBSTM On and Off1 Collision Mitigation Braking SystemTM (CMBSTM)
The CMBS
TM may automatically shut off, and the
safety support indicator (amb er) will come and stay
on under certain conditions:
2 CMBS
TM Conditions and Limitations P. 517
When the CMBS
TM is activated, it will continue to
operate even if the accele rator pedal is partially
depressed. However, it w ill be canceled if the
accelerator pedal is deeply depressed.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow*, adaptive cruise
control (ACC)*, safety support and low tire pressure/
TPMS indicators may come on in amber along with a
message in the driver info rmation interface when you
set the power mode to ON after reconnecting the
battery.
Drive a short distance at mo re than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
Left Selector Wheel
Safety Support Switch
* Not available on all models

uuHonda Sensing ®u Road Departure Mitigation (RDM) System
564
Driving
When you turn the RDM on and off, do the
following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
u The message appears on the driver
information interface when the system
becomes on or off.
The RDM is in the previously selected ON or
OFF setting each time you start the engine.
The system may not properly detect lane markings and the position of your vehicle
under certain conditions. Some examples of these conditions are listed below.
■Environmental conditions
• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between la ne lines and the roadway surface.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Shadows of adjacent objects are parallel to lane markings.
• Roadway objects or structures are misinterpreted as lane markers.
• Reflections on the interi or of the windshield.
• Driving at night or in a dark condition such as a tunnel.
■RDM On and Off1RDM On and Off
When you have selected Warning Only from the
customized options using the audio/information
screen, the system does not operate the steering
wheel and braking. 2 Customized Features P. 372, 383
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow*, adaptive cruise
control (ACC)*, safety support and low tire pressure/
TPMS indicators may come on in amber along with a
message in the driver info rmation interface when you
set the power mode to ON after reconnecting the
battery.
Drive a short distance at mo re than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
Safety Support Switch Left Selector Wheel
■RDM Conditions and Limitations
* Not available on all models

Continued579
uuBraking uBrake System
Driving
■Activating and deactivating the automatic parking brake feature
With the power mode is in ON, carry out th e following steps to either activate or
deactivate the automatic parking brake feature.
1. Put the transmission into
(P.
2. Without depressing the brake pedal, pull up and release the parking brake switch.
u Check that the parking brake indicator (red) has come on.
3. Pull up and hold the parking brake swit ch. When you hear a beeping sound,
release the switch and within 3 seconds pull up and hold the switch again.
4. When you hear a sound indicating that the procedure is completed, release the
switch.
u Two beeps indicates that the feature has been activated.
u One beep indicates that the feature has been deactivated.
u When you have completed activating the feature, the parking brake will
remain applied after you turn off the engine.
u To confirm that the park ing brake is applied, check if the parking brake
indicator (red) is on.
If you need to temporarily deactivate th e feature for when putting your vehicle
through a conveyor type car wash, you can follow the procedure explained below.
1. Depress the brake pedal and bring the vehicle to a stop.
2. Set the power mode to VEHICLE OFF and then within 2 seconds push down the
parking brake switch.
u Activation and deactivation settings for the feature will not be affected.
u Before temporarily deactivating the feat ure, make sure to first turn off both
ACC with Low Speed Follow and the automatic brake hold system.
u To confirm that the park ing brake is applied, check if the parking brake
indicator (red) is on.
Automatic transmission/Continuousl y variable transmission models1Parking Brake
In cold climates, the parking brake may freeze in
place if applied.
When parking the vehicle, chock the wheels and
make sure the automatic parking brake feature is
deactivated.
Also, when putting your vehicle through a conveyor-
type car wash or when ha ving your vehicle towed,
deactivate the automatic parking brake feature and
leave the parking brake released.
Automatic transmission models

uuBraking uBrake System
580
Driving
Your vehicle is equipped with disc brakes at all four wh eels. The brake assist system
increases the stopping force when you depress the brake pedal hard in an
emergency situation. The anti-lock brake system (ABS) helps you retain steering
control when braking very hard.
2 Brake Assist System P. 586
2 Anti-lock Brake System (ABS) P. 585
■Foot Brake1Foot Brake
Check the brakes after driving through deep water,
or if there is a buildup of road surface water. If
necessary, dry the brakes by lightly depressing the
pedal several times.
If you hear a continuous me tallic friction sound when
applying the brakes, this is caused by the brake wear
indicator rubbing on the brak e disk and indicates that
the brake pads need to be replaced. Have the vehicle
checked by a dealer. If y ou hear only an occasional
squeak or squeal when y ou initially apply the brake
pedal, this may be normal and caused by high
frequency vibration of th e brake pads against the
rotating brake disc.
Constantly using the brake pedal while going down a
long hill builds up heat, which reduces the brake
effectiveness. Apply engine braking by taking your
foot off the accelerator pe dal and downshifting to a
lower gear/speed po sition. With manual
transmission
* use a lower gear for greater engine
braking.
Do not rest your foot on the brake pedal while
driving, as it will lightly apply the brakes and cause
them to lose effectiveness over time and reduce pad
life. It will also conf use drivers behind you.
Whenever the brakes are activated by CMBS
TM or
another system that automa tically controls braking,
the brake pedal is depressed and released in
accordance with braking function.
* Not available on all models

585
uuBraking uAnti-lock Brake System (ABS)
Driving
Anti-lock Brake System (ABS)
Helps prevent the wheels from locking up, and helps you retain steering control by
pumping the brakes rapidly, much faster than you.
The electronic brake distribu tion (EBD) system, which is part of the ABS, also
balances the front-to-rear braking distribution according to vehicle loading.
You should never pump the brake pedal. Let the ABS work for you by always
keeping firm, steady pressure on the brake pe dal. This is sometimes referred to as
“stomp and steer.”
■ABS operation
The brake pedal may pulsate slightly when the ABS is working. Depress the brake
pedal and keep holding the pedal firmly do wn. On dry pavement, you will need to
press on the brake pedal very hard before th e ABS activates. However, you may feel
the ABS activate immediately if you are trying to stop on snow or ice.
ABS may activate when you depres s the brake pedal when driving on:
• Wet or snow covered roads.
• Roads paved with stone.
• Roads with uneven surf aces, such as potholes, cracks, manholes, etc.
When the vehicle speed goes under 6 mph (10 km/h), the ABS stops.
■ABS1Anti-lock Brake System (ABS)
NOTICE
The ABS may not function correctly if you use a tire of
the wrong size or type.
If the ABS indicator comes on while driving, there
may be a problem with the system. While normal
braking will not be affected, there is a possibility that
the ABS will not be opera ting. Have your vehicle
checked by a dealer immediately.
The ABS is not designed for the purpose of reducing
the time or distance it takes for a vehicle to stop: It is
designed to limit brake lo ckup which can lead to
skidding and loss of steering control.
In the following cases, yo ur vehicle may need more
distance to stop than a vehicle without the ABS:
•You are driving on rough or uneven road surfaces,
such as gravel or snow.
•The tires are equipped with snow chains*.
The following may be observed with the ABS system:
•Motor sounds coming from the engine
compartment when the brakes are applied, or
when system checks are being performed after the
engine has been started and while the vehicle
accelerates.
•Brake pedal and/or the vehicle body vibration when
ABS activates.
These vibrations and sounds are normal to ABS
systems and are no cause for concern.
* Not available on all models

607
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 608
Safety When Performing Maintenance..... 609Parts and Fluids Used in Maintenance Service ........................................... 610
Maintenance Minder
TM..................... 611
Maintenance Under the Hood
Maintenance Items Under the Hood ..... 618Opening the Hood ........................... 620
Recommended Engine Oil ................ 621
Oil Check ......................................... 622
Adding Engine Oil ............................ 624
Changing the Engine Oil and Oil Filter ..... 625
Engine Coolant ................................ 629
Transmission Fluid ............................ 631
Brake/Clutch
* Fluid .......................... 633
Refilling Window Wa sher Fluid......... 634
Replacing Light Bulbs ....................... 635
Checking and Maintaining Wiper
Blades .......................................... 643
Checking and Maintaining Tires
Checking Tires ................................. 646
Tire and Loading Information Label ...... 647Tire Labeling .................................... 647DOT Tire Quality Grading (U.S. Vehicles)....... 649Wear Indicators................................ 651 Tire Service Life ................................ 651
Tire and Wheel Replacement ........... 652
Tire Rotation .................................... 653
Winter Tires ..................................... 654
Battery ............................................... 655
Remote Transmitter Care
Replacing the Button Battery ........... 657
Climate Control System Maintenance.... 658Cleaning
Interior Care .................................... 659
Exterior Care.................................... 661
Accessories and Modifications ........ 664
* Not available on all models

620
uuMaintenance Under the Hood uOpening the Hood
Maintenance
Opening the Hood
1. Park the vehicle on a level surface, and set
the parking brake.
2. Pull the hood release handle under the
driver’s side lower corner of the dashboard.
u The hood will pop up slightly.
3. Push the hood latch lever (located under
the front edge of the hood to the center)
and raise the hood. Once you have raised
the hood slightly, you can release the lever.
4. Remove the support rod from the clamp
using the grip. Mount the support rod in
the hood.
When closing, remove the support rod, and
stow it in the clamp, then gently lower the
hood. Remove your hand at a height of
approximately 12 inches (30 cm) and let the
hood close.1 Opening the Hood
NOTICE
Do not open the hood when the wiper arms are
raised.
The hood will strike the wipe rs, resulting in damage
to the hood and/or the wipers.
When closing the hood, check that the hood is
securely latched.
Do not press the engine cover forcibly. This may
damage the engine cover and component parts.
If the hood latch lever moves stiffly, or if you can
open the hood without lifti ng the lever, the latch
mechanism should be cl eaned and lubricated.
2.0 L engine models
Hood Release Handle
Pull
Lever
Support Rod
Grip
Clamp