check engine HONDA CIVIC 2023 Workshop Manual

781Continued
Handling the Unexpected
Engine Does Not Start
Checking the Engine
If the engine does not start, check the starter.
Starter conditionChecklist
Starter doesn't turn or turns
over slowly.
The battery may be dead. Check
each of the items on the right and
respond accordingly.Check for a message on the driver information interface.●If the To start, touch start button with emblem side of remote message appears2If the Keyless Remote Battery is Weak P. 783
uMake sure the keyless remote is in its operating range.2 ENGINE START/STOP Button Operating Range P. 202
Check the fuses.
Check all fuses, or have your vehicle checked by a dealer.
2Inspecting and Changing Fuses P. 806
Check the battery.
Have the battery checked by a dealer.
2Battery P. 747
1Checking the Engine
If you must start the vehi cle immediately, use an
assisting vehicle or booster battery to jump start it.
2 If the Battery Is Dead P. 786
Depending on the situation, it may be possible to
temporarily start the engine using the emergency
start procedure. 2 Emergency Engine Start P. 784
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782
uuEngine Does Not Start uChecking the Engine
Handling the Unexpected
Starter conditionChecklist
The starter turns over normally
but the engine doesn't start.
There may be a problem with a
fuse. Check each of the items on
the right and resp ond accordingly. Review the engine start procedure.
Follow its instructions, and try to start the engine again.
2
Starting the Engine P. 493
Check the immobilizer system indicator.
When the immobilizer system indicator is blinking, the engine cannot be started.
2Immobilizer System P. 195
Check the fuel level.
There should be enough fuel in the tank.
2Fuel Gauge P. 119
Check the fuses.
Check all fuses, or have the vehicle checked by a dealer.
2Inspecting and Changing Fuses P. 806
If the problem continues:2Emergency Towing P. 808
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784
uuEngine Does Not StartuEmergency Engine Start
Handling the Unexpected
Emergency Engine Start
If the engine does not start using the normal engine starting procedure, you may be
able to start it using the emergency start procedure below.
Do not use this procedure if it is not an emergency.
1. Make sure the parking brake is applied.
2. Check that the tra nsmission is in
(P, then set the power mode to ACCESSORY.
3. Firmly depress the brake pedal, then press and hold the ENGINE START/STOP
button for at least 15 seconds.
This should be considered a system malfunction even if you are able to start the
engine using the above procedure.
Have your vehicle checked by a dealer immediately.
Continuously variable transmission models
1Emergency Engine Start
Refer to the following if you cannot move the shift
lever out of the
( P position.
2 Shift Lever Does Not Move P. 790
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787
uuIf the Battery Is Dead uJump Starting Procedure
Continued
Handling the Unexpected
1. Open the cover on the positive + terminal.
2. Connect the first jumper cable to your
vehicle's battery + terminal.
3. Connect the other end of the first jumper
cable to the booster battery + terminal.
u Use a 12-volt booster battery only.
u When using an automotive battery
charger to boost your 12-volt battery,
select a lower charging voltage than
15-volt. Check the charger manual for
the proper setting.
4. Connect the second jumper cable to the
booster battery - terminal.
Booster Battery
1.5 L engine models
Booster Battery
2.0 L engine models
with Auto Idle Stop
2.0 L engine models
without Auto Idle Stop
Booster Battery
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uuIf the Battery Is Dead uJump Starting Procedure
788
Handling the Unexpected
5. Connect the other end of the second
jumper cable to the stud bolt as shown. Do
not connect this jumper cable to any other
part.
6. If your vehicle is connected to another
vehicle, start the assi sting vehicle's engine
and increase its rpm slightly.
7. Attempt to start your vehicle's engine. If it
turns over slowly, check that the jumper
cables have good metal-to-metal contact.1If the Battery Is Dead
Battery performance degrades in cold conditions and
may prevent the engi ne from starting.1.5 L engine models
2.0 L engine models
with Auto Idle Stop
2.0 L engine models
without Auto Idle Stop
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789
uuIf the Battery Is Dead uJump Starting Procedure
Handling the Unexpected
Once your vehicle's engine has started, re move 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 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 Engine Starts1What to Do After the Engine Starts
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 gauge 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.
* Not available on all models
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uuOverheating uHow to Handle Overheating
792
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
stop the engine once the Engine
temperature too hot. Do not drive.
Allow engine to cool. message on the
driver information interface disappears.
u If the cooling fan is not operating,
immediately stop the engine.
2. Once the engine has cooled down, inspect
the coolant level an d check the cooling
system components for leaks.
u If the coolant level in the reserve tank is
low, add coolant until it reaches the
MAX mark.
u If there is no coolan t in the reserve tank,
check that the radiator is cool. Cover the
radiator cap with a heavy cloth and open
the cap. If necessary, add coolant up to
the base of the filler neck, and put the
cap back on.
■Last thing to do
Once the engine has cooled sufficiently, re start it and check the driver information
interface.
If the Engine temperature too hot. Do not drive. Allow engine to cool.
message does not appear, resume driving. If it appears again, contact a dealer for
repairs.
1 How to Handle Overheating
If the coolant is leaking, contact a dealer for repairs.
Use water as an emergency/temporary measure only.
Have a dealer flush the system with proper antifreeze
as soon as possible.
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
Reserve Tank
MIN
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uuOverheating uHow to Handle Overheating
794
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
stop the engine once the temperature
gauge goes down.
u If the cooling fan is not operating,
immediately stop the engine.
2. Once the engine has cooled down, inspect
the coolant level an d check the cooling
system components for leaks.
u If the coolant level in the reserve tank is
low, add coolant until it reaches the
MAX mark.
u If there is no coolan t in the reserve tank,
check that the radiator is cool. Cover the
reserve tank cap with a heavy cloth and
open the cap. If necessary, add coolant
up to the base of the filler neck, and put
the cap back on.
■Last thing to do
Once the engine has cooled sufficiently, restart it and check the temperature gauge.
If the temperature gauge has gone down, re sume driving. If it has not gone down,
contact a dealer for repairs.
1 How to Handle Overheating
If the coolant is leaking, contact a dealer for repairs.
Use water as an emergency/temporary measure only.
Have a dealer flush the system with proper antifreeze
as soon as possible.
3WARNING
Removing the reserve tank 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 reserve tank
cap.MAX
Reserve Tank
MIN
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795
Handling the Unexpected
Indicator, Coming On/Blinking
If the Engine oil pressure low Warning Appears
■Reasons for the warning to appear
Appears when the engine oil pressure is low.
■What to do as soon as the warning
appears
1. Immediately park the vehicle on level
ground in a safe place.
2. If necessary, turn the hazard warning lights
on.
■What to do after parking the vehicle
1. Stop the engine and let it sit for
approximately three minutes.
2. Open the hood and ch eck the oil level.
u Add oil as necessary.
2 Oil Check P. 713
3.Start the engine and check the Engine oil
pressure low warning.
u The warning disappears: Start driving
again.
u The warning does not disappear within
10 seconds: Immediately stop the engine
and contact a dealer for repairs.
1If the Engine oil pressure low Warning Appears
NOTICE
Running the engine with low oil pressure can cause
serious mechanical damage almost immediately.
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796
uuIndicator, Coming On/BlinkinguIf the Charging System Indicator Comes On
Handling the Unexpected
If the Charging System Indicator Comes On
■Reasons for the indicator to come on
Comes on when there is a prob lem with the charging system.
■What to do when the indicator comes on
Stop in a safe place and have yo ur vehicle checked by a dealer
immediately.
If the Malfunction Indicator Lamp Comes On or Blinks
■Reasons for the indicator la mp to come on or blink
• Comes on when there is a problem with the engine emissions control
system.
• Blinks when engine misfiring is detected.
■What to do when the indicator lamp comes on
Avoid high speeds and immediately get your vehicle inspected at a
dealer.
■What to do when the indicator lamp blinks
Park the vehicle in a safe place with no flammable items and wait at least
10 minutes or more with the engine stopped until it cools.
1 If the Charging System Indicator Comes On
If you need to stop temporarily, do not turn off the
engine. Restarting the engi ne may rapidly discharge
the battery.
1 If the Malfunction Indicato r Lamp Comes On or Blinks
NOTICE
If you drive with the malf unction indicator lamp on,
the emissions control system and the engine could be
damaged.
If the malfunction indicator lamp blinks again when
restarting the engine, drive to the nearest dealer at
31 mph (50 km/h) or less. Have your vehicle
inspected.
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