check engine HONDA ACCORD SEDAN 2021 (in English) Owner's Guide

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uuWhen Driving uPrecautions While Driving
Driving
Precautions While Driving
Avoid driving in deep water and on flooded roads. This can damage the engine or
driveline, or cause electrical component failure.
If there is a strong impact with something under the vehicle, stop in a safe location.
Check the underside of the vehicle for damage or any fluid leaks.
■In Rain
■Other Precautions
1 Precautions While Driving
NOTICE
Do not change the transmission while pressing the
accelerator pedal. You could damage the
transmission.
NOTICE
If you repeatedly turn the steering wheel at an
extremely low speed, or hold the steering wheel in
the full left or right position for a while, the electric
power steering (EPS) system heats up. The system
goes into a protective mode, and limits its
performance. The steering wheel becomes harder
and harder to operate. Once the system cools down,
the EPS system is restored.
Repeated operation under these conditions can
eventually damage the system.
If the power mode is set to ACCESSORY while
driving, the engine will shut down and all steering
and brake power assist functi ons will stop, making it
difficult to control the vehicle.
Do not select
( N while driving as you will lose engine
braking (and accelera tion) performance.
During the first 600 miles (1,000 km) of operation,
avoid sudden acceleration or full throttle operation so
as not to damage the engine or powertrain.
Avoid hard braking for the first 200 miles (300 km).
You should also follow this when the brake pads are
replaced.

Continued423
uuWhen Driving uShifting
Driving
■Shift Operation1Shift Operation
NOTICE
When you change (D to (R and vice versa, depress
the brake pedal to come to a complete stop, then
select the intended shift position while maintaining
brake pressure.
Use the shift position indi cator and the shift button
indicator to check the shift position before selecting a
shift button.
If the indicator of the currently selected shift position,
or all the shift position indicators are blinking
simultaneously, there is a problem with the
transmission.
Avoid sudden acceleration and have the transmission
checked by a dealer as soon as possible.
The fuel supply may be cut of f if you drive at engine
speeds in or over the tac hometer’s red zone (engine
speed limit). If this happe ns, you may experience a
slight jolt.
When the engine speed is increased while the
transmission is in
( N, (P or (R, the fuel supply may
be cut off even without the engine speed entering
the tachometer’s red zone.
The beeper sounds once when you change to
( R.
2 Customized Features P. 352
Press the (P button.
Pull back the
( R button.
Press the
( N button.
Press the
( D button.
Shift Button Indicator M
(sequential mode) Indicator
Tachometer’s red zone Gear Selection Indicator
Shift Position Indicator

uuWhen Driving uShifting
430
Driving
■Shift Lever Operation1Shift Lever Operation
NOTICE
When you change the shift position from (D to ( R
and vice versa, come to a complete stop and keep the
brake pedal depressed.
Operating the shift lever be fore the vehicle has come
to a complete standstill can damage the transmission.
Use the shift position indicator to check the lever
position before pulling away.
If the transmission system indicator blinks when
driving, in any shift positi on, there is a problem with
the transmission.
Avoid sudden acceleration and have the transmission
checked by a dealer as soon as possible.
The fuel supply may be cut of f if you drive at engine
speeds in or over the tac hometer’s red zone (engine
speed limit). If this happe ns, you may experience a
slight jolt.
It may not be possible to operate the shift lever if the
brake pedal is applied while the shift lever release
button is held down.
Depress the brake pedal first.
When shifting positions in extremely low
temperatures (-22°F/-30°C), there may be a short
delay before the shift posit ion is displayed. Always
confirm you are in the corr ect shift position before
driving.
Depress the brake pedal and press the shift lever release
button to shift.
Shift without pres sing the shift lever release button.
Press the shift lever release button and shift.
Shift Position Indicator
(Transmission System Indicator)
Tachometer’s red zone

uuWhen Driving uShifting
432
Driving
■Shift Lever Operation1Shift Lever Operation
NOTICE
When you change the shift position from (D to ( R
and vice versa, come to a complete stop and keep the
brake pedal depressed.
Operating the shift lever be fore the vehicle has come
to a complete standstill can damage the transmission.
Use the shift position indicator to check the lever
position before pulling away.
If the transmission system indicator blinks when
driving, in any shift positi on, there is a problem with
the transmission.
Avoid sudden acceleration and have the transmission
checked by a dealer as soon as possible.
The fuel supply may be cut of f if you drive at engine
speeds in or over the tac hometer’s red zone (engine
speed limit). If this happe ns, you may experience a
slight jolt.
It may not be possible to operate the shift lever if the
brake pedal is applied while the shift lever release
button is held down.
Depress the brake pedal first.
When shifting positions in extremely low
temperatures (-22°F/-30°C), there may be a short
delay before the shift posit ion is displayed. Always
confirm you are in the corr ect shift position before
driving.
Depress the brake pedal and press the shift lever release
button to shift.
Shift without pressing the shift lever release button. Press the shift lever re lease button and shift.
Shift Position Indicator
(Transmission System Indicator)
Tachometer’s red zone
M
(7-Speed Manual Shift Mode)
Indicator
Gear Selection Indicator

443
uuWhen Driving uVehicle Stability AssistTM (VSA ®), aka Electronic Stability Control (ESC), System
Continued
Driving
Vehicle Stability AssistTM (VSA ®), aka Electronic
Stability Control (ESC), System
VSA ® helps stabilize the vehicle during cornering if the vehicle turns more or less
than what was intended. It also assists in maintaining traction on slippery surfaces.
It does so by regulating engine ou tput and selectively applying the brakes.
When VSA ® activates, you may notice that the
engine does not respond to the accelerator.
You may also notice some noise from the
hydraulic brake system. You will also see the
indicator blink.
■VSA ® Operation
1 Vehicle Stability AssistTM (VSA® ), aka Electronic Stability Control
(ESC), System
The VSA ® may not function properl y if tire type and
size are mixed. Make sure to use the same size and
type of tire, and the air pressures as specified.
When the VSA ® system indicator comes on and stays
on while driving, there ma y be a problem with the
system. While this may not interfere with normal
driving, have your vehi cle checked by a dealer
immediately.
VSA ® cannot enhance stability in all driving situations
and does not control the entire braking system. You
still need to drive and corner at speeds appropriate
for the conditions and always leave a sufficient
margin of safety.
The main function of the VSA ® system is generally
known as Electronic Stability Control (ESC). The
system also includes a traction control function.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
VSA ® System
Indicator

uuWhen Driving uVehicle Stability AssistTM (VSA ®), aka Electronic Stability Control (ESC), System
444
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 traction 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

Continued461
uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
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 CMBSTM On and Off
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. 462
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 fully depressed.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more 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

Continued469
uuHonda Sensing ®u Low Speed Braking Control*
Driving
When you turn the system 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
turns on or off.
The system is turned on every time you start
the engine, even if you turned it off the last
time you drove the vehicle.
■System On and Off 1 System On and Off
If the battery is disconnected and reconnected, the
Low Speed Braking Control may not turn on right
away when you start the engine.
The system will automatically turn ON after the
vehicle has been moving at over 12mph (20km/h) for
some time.
If the system does not turn on, have your vehicle
checked by a dealer.
Left Selector Wheel
Safety Support Switch

uuHonda Sensing ®u Road Departure Mitigation (RDM) System
498
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. 352
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more 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

uuBraking uBrake System
512
Driving
■Automatic parking brake feature operation
If the automatic parking brake feature has been activated:
• The parking brake is applied automatica lly when you set the power mode to
VEHICLE OFF.
• To confirm that the parking brake is appl ied, check if the parking brake and brake
system indicator (red) is on.
2 Activating and deactivating the automatic parking brake feature P. 513
■To release automatically
Depressing the accelerator pedal releases the parking brake.
Use the accelerator pedal to release th e brake when you are starting the vehicle
facing uphill, or in a traffic jam. Gently depress the accelerator pedal.
When on a hill, it may require more
accelerator input to release.u The parking brake and brake system
indicator (red) goes off.
You can release the parki ng brake automatically when:
• You are wearing the driver’s seat belt.
• The engine is running.
• The transmission is not in
(P or (N.
1Parking Brake
If the parking brake cannot be released
automatically, release it manually.
When the vehicle is travel ing uphill, the accelerator
pedal may need to be pressed farther to
automatically release the electric parking brake.
The parking brake cannot be released automatically
while the following indicators are on:
•Malfunction indicator lamp•Transmission system indicator
The parking brake may not be released automatically
while the following indicators are on:
•Parking brake and bra ke system indicator
•VSA® system indicator•ABS indicator
•Supplemental restraint system indicator
Accelerator Pedal