check engine FORD MUSTANG 2023 User Guide

Important Ventilating Information
If you stop your vehicle and the leave theengine idling for long periods, werecommend that you do one of thefollowing:
•Open the windows at least 1 in(2.5 cm).
•Set your climate control to outside air.
ENGINE BLOCK HEATER (IF
EQUIPPED)
WARNING: Failure to follow engineblock heater instructions could result inproperty damage or serious personalinjury.
WARNING: Do not use your heaterwith ungrounded electrical systems ortwo-pronged adapters. There is a risk ofelectrical shock.
WARNING: Do not fully close thehood, or allow it to drop under its ownweight when using the engine blockheater. This could damage the powercable and may cause an electrical shortresulting in fire, injury and propertydamage.
Note:The heater is most effective whenoutdoor temperatures are below 0°F(-18°C).
The heater acts as a starting aid bywarming the engine coolant. This allowsthe climate control system to respondquickly. The equipment includes a heaterelement, installed in the engine block anda wire harness. You can connect thesystem to a grounded 120-volt ACelectrical source.
We recommend that you do the followingfor a safe and correct operation:
•Use a 16-gauge outdoor extension cordthat is product certified byUnderwriter’s Laboratory (UL) orCanadian Standards Association(CSA). This extension cord must besuitable for use outdoors, in coldtemperatures, and be clearly markedSuitable for Use with OutdoorAppliances. Do not use an indoorextension cord outdoors. This couldresult in an electric shock or become afire hazard.
•Use as short an extension cord aspossible.
•Do not use multiple extension cords.
•Make sure that when in operation, theextension cord plug and heater cordplug connections are free and clear ofwater. This could cause an electricshock or fire.
•If the block heater cord is under thehood, Do Not remove the wiring fromits original location. Do Not close thehood on the extension wiring.
•Make sure your vehicle is parked in aclean area, clear of combustibles.
•Make sure the heater, heater cord andextension cord are firmly connected.
•Check for heat anywhere in theelectrical hookup once the system hasbeen operating for approximately 30minutes.
•Make sure the system is unplugged andproperly stowed before starting anddriving your vehicle. Make sure theprotective cover seals the prongs of theblock heater cord plug when not in use.
•Make sure the heater system ischecked for proper operation beforewinter.
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2023 Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-11-2022, enUSA, Edition date: 202209, First-PrintingStarting and Stopping the Engine

5.Operate the fuel pump nozzle withinthe area shown.
6.When you finish refueling slightly raisethe fuel pump nozzle and slowlyremove it.
7.Fully close the fuel filler door.
Do not attempt to start the engine if youhave filled the fuel tank with incorrect fuel.Incorrect fuel use could cause damage notcovered by the vehicle Warranty. Have yourvehicle immediately checked.
Refueling System Warning (If Equipped)
If the fuel tank filler valve does not fullyclose, a message could appear in theinformation display.
Message
Check Fuel Fill Inlet
If the message appears, do the following:
1.Stop your vehicle as soon as it is safeto do so and switch the engine off.
2.Shift into park (P) or neutral (N).
3.Apply the parking brake.
4.Fully open the fuel filler door.
5.Check the fuel tank filler valve for anydebris that may be restricting itsmovement.
6.Remove any debris from the fuel tankfiller valve.
7.Fully insert a fuel pump nozzle or thefuel filler funnel provided with yourvehicle into the fuel filler pipe. SeeFuel Filler Funnel Location (page153). This action should dislodge anydebris that may be preventing the fueltank filler valve from fully closing.
8.Remove the fuel pump nozzle or fuelfiller funnel from the fuel filler pipe.
9.Fully close the fuel filler door.
Note:The message may not immediatelyreset. If the message continues to appearand a warning lamp illuminates, have yourvehicle checked as soon as possible.
FUEL CONSUMPTION
Advertised Capacity
The advertised capacity is the maximumamount of fuel that you can add to the fueltank after running out of fuel. Included inthe advertised capacity is an emptyreserve. The empty reserve is anunspecified amount of fuel that remainsin the fuel tank when the fuel gaugeindicates empty.
Note:The amount of fuel in the emptyreserve varies and should not be relied uponto increase driving range.
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EMISSION LAW
WARNING: Do not remove or alterthe original equipment floor covering orinsulation between it and the metal floorof the vehicle. The floor covering andinsulation protect occupants of thevehicle from the engine and exhaustsystem heat and noise. On vehicles withno original equipment floor coveringinsulation, do not carry passengers in amanner that permits prolonged skincontact with the metal floor. Failure tofollow these instructions may result infire or personal injury.
U.S. federal laws and certain state lawsprohibit removing or rendering inoperativeemission control system components.Similar federal or provincial laws mayapply in Canada. We do not approve of anyvehicle modification without firstdetermining applicable laws.
Tampering with emissionscontrol systems includingrelated sensors can result inreduced engine power and the illuminationof the service engine soon light.
Tampering With a Noise ControlSystem
Federal laws prohibit the following acts:
•Removal or rendering inoperative byany person other than for purposes ofmaintenance.
•Repair or replacement of any device orelement of the design incorporated intoa new vehicle for the purpose of noisecontrol prior to its sale or delivery tothe ultimate purchaser or while it is inuse.
•The use of the vehicle after any personremoves or renders inoperative anydevice or element of the design.
The U.S. Environmental Protection Agencymay presume to constitute tampering asfollows:
•Removal of hood blanket, fender apronabsorbers, fender apron barriers,underbody noise shields or acousticallyabsorptive material.
•Tampering or rendering inoperative theengine speed governor, to allow enginespeed to exceed manufacturerspecifications.
If the engine does not start, runs rough,experiences a decrease in engineperformance, experiences excess fuelconsumption or produces excessiveexhaust smoke, check for the following:
•A plugged or disconnected air inletsystem hose.
•A plugged engine air filter element.
•A clogged fuel filter.
•Contaminated fuel.
•Air in the fuel system, due to looseconnections.
•Fuel system leaks, due to looseconnections.
•An open or pinched sensor hose.
•Incorrect engine oil level.
•Incorrect fuel for climatic conditions.
•Incorrect engine oil viscosity forclimactic conditions.
Note:Some vehicles have a lifetime fuelfilter that is integrated with the fuel tank.Regular maintenance or replacement is notneeded.
Note:If these checks do not help youcorrect the concern, see your authorizeddealer as soon as possible.
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On-Board Diagnostics (OBD-II)
Your vehicle has a computer known as theon-board diagnostics system (OBD-II) thatmonitors the engine’s emission controlsystem. The system protects theenvironment by making sure that yourvehicle continues to meet governmentemission standards. The OBD-II systemalso assists a service technician in properlyservicing your vehicle.
When the service engine soonindicator illuminates, the OBD-IIsystem has detected amalfunction. Temporary malfunctions maycause the service engine soon indicator toilluminate. Examples are:
1.Your vehicle has run out of fuel—theengine may misfire or run poorly.
2.Poor fuel quality or water in thefuel—the engine may misfire or runpoorly.
3.The fuel fill inlet may not have closedproperly. See Refueling (page 155).
4.Driving through deep water—theelectrical system may be wet.
You can correct these temporarymalfunctions by filling the fuel tank withgood quality fuel, properly closing the fuelfill inlet or letting the electrical system dryout. After three driving cycles without theseor any other temporary malfunctionspresent, the service engine soon indicatorshould stay off the next time you start theengine. A driving cycle consists of a coldengine startup followed by mixed city andhighway driving. No additional vehicleservice is required.
If the service engine soon indicator remainson, have your vehicle serviced at the firstavailable opportunity. Although somemalfunctions detected by the OBD-II maynot have symptoms that are apparent,continued driving with the service enginesoon indicator on can result in increasedemissions, lower fuel economy, reducedengine and transmission smoothness andlead to more costly repairs.
Readiness for Inspection andMaintenance (I/M) Testing
Some state and provincial and localgovernments may haveInspection/Maintenance (I/M) programsto inspect the emission control equipmenton your vehicle. Failure to pass thisinspection could prevent you from gettinga vehicle registration.
If the service engine soonindicator is on or the bulb doesnot work, your vehicle may needservice. See On-Board Diagnostics.
Your vehicle may not pass the I/M test ifthe service engine soon indicator is on ornot working properly (bulb is burned out),or if the OBD-II system has determinedthat some of the emission control systemshave not been properly checked. In thiscase, the vehicle is not ready for I/Mtesting.
If the vehicle’s engine or transmission hasjust been serviced, or the battery hasrecently run down or been replaced, theOBD-II system may indicate that thevehicle is not ready for I/M testing. Todetermine if the vehicle is ready for I/Mtesting, turn the ignition key to the onposition for 15 seconds without crankingthe engine. If the service engine soonindicator blinks eight times, it means thatthe vehicle is not ready for I/M testing; ifthe service engine soon indicator stays onsolid, it means that your vehicle is readyfor I/M testing.
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The OBD-II system checks the emissioncontrol system during normal driving. Acomplete check may take several days.
If the vehicle is not ready for I/M testing,you can perform the following driving cycleconsisting of mixed city and highwaydriving:
1.15 minutes of steady driving on anexpressway or highway followed by 20minutes of stop-and-go driving with atleast four 30-second idle periods.
2.Allow your vehicle to sit for at leasteight hours with the ignition off. Then,start the vehicle and complete theabove driving cycle. The vehicle mustwarm up to its normal operatingtemperature. Once started, do not turnoff the vehicle until the above drivingcycle is complete.
If the vehicle is still not ready for I/Mtesting, you need to repeat the abovedriving cycle.
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2023 Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-11-2022, enUSA, Edition date: 202209, First-PrintingEngine Emission Control

Manually Shifting Gears (If Equipped)
Shifting Using Paddle Shifters
The instrument cluster displays the currentgear. The current gear flashes when yourvehicle cannot shift into the requestedgear. Your vehicle will not shift if therequested gear raises or lowers the enginespeed beyond the limit.
Your vehicle could shift when you fullypress the accelerator or brake pedal.
Note:Prolonged driving with high enginespeed could cause vehicle damage notcovered by the vehicle warranty.
Note:Drive modes could affect when thevehicle shifts into the requested gear.
Manually Shifting Gears in Drive (D)
Use this feature when overtaking anothervehicle, or to temporarily change gear.
•Pull any paddle to switch the featureon.
•Pull the right (+) paddle to upshift.
•Pull the left (-) paddle to downshift.
•Hold the (+) paddle for a few secondsto switch the feature off.
Note:The feature switches off after a shortperiod of time if you do not pull eitherpaddle.
Manually Shifting Gears in Sport (S)
Use this feature for engine braking on hillyor mountainous roads, or to select aspecific gear.
•Pull any paddle to switch the featureon.
•Pull the right (+) paddle to upshift.
•Pull the left (-) paddle to downshift.
•Hold the + paddle for a few secondsto switch the feature off.
Transmission Not in Park (P)Audible Warning
Sounds if any of the following occur:
•You switch your vehicle off beforeshifting into park (P).
•You open the driver door before shiftinginto park (P).
Brake-Shift Interlock
WARNING: Do not drive yourvehicle until you verify that thestoplamps are working.
WARNING: When doing thisprocedure, you need to take thetransmission out of park (P) whichmeans your vehicle can roll freely. Toavoid unwanted vehicle movement,always fully apply the parking brake priorto doing this procedure. Use wheelchocks if appropriate.
WARNING: If the parking brake isfully released, but the brake warninglamp remains illuminated, the brakesmay not be working properly. Have yourvehicle checked as soon as possible.
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GENERAL INFORMATION
Note: Occasional brake noise is normal. Ifa metal-to-metal, continuous grinding orcontinuous squeal sound is present, thebrake linings may be worn-out and anauthorized dealer should check them. If thevehicle has continuous vibration or shudderin the steering wheel while braking, anauthorized dealer should check your vehicle.
Note: Brake dust may accumulate on thewheels, even under normal drivingconditions. Some dust is inevitable as thebrakes wear and does not contribute tobrake noise. See Cleaning the Wheels(page 298).
Wet brakes result in reduced brakingefficiency. Gently press the brake pedal afew times when driving from a car wash orstanding water to dry the brakes.
Brake Over Accelerator
In the event the accelerator pedalbecomes stuck or entrapped, apply steadyand firm pressure to the brake pedal toslow the vehicle and reduce engine power.If you experience this condition, apply thebrakes and bring your vehicle to a safestop. Move the transmission to park (P),switch the engine off and apply the parkingbrake. Inspect the accelerator pedal forany interference. If none are found and thecondition persists, have your vehicle towedto the nearest authorized dealer.
Emergency Brake Assist
Emergency brake assist detects when youbrake heavily by measuring the rate atwhich you press the brake pedal. Itprovides maximum braking efficiency aslong as you press the pedal. Emergencybrake assist can reduce stopping distancesin critical situations.
Note:Depending on applicable laws andregulations in the country for which yourvehicle was originally built, your brake lampscould flash during heavy braking. Followingthis, your hazard lights may also flash whenyour vehicle comes to a stop.
Anti-lock Brake System
This system helps you maintain steeringcontrol during emergency stops by keepingthe brakes from locking.
This lamp momentarilyilluminates when you switch theignition on. If the light does notilluminate during start up, remains on orflashes, the anti-lock braking system maybe disabled. Have the system checked byan authorized dealer. If the anti-lock brakesystem is disabled, normal braking is stilleffective.
See Warning Lamps and Indicators(page 93).
Note:Indicators vary depending on region.
This lamp also illuminatesmomentarily when you switchthe ignition on to confirm thelamp is functional. If it does notilluminate when you switch theignition on, or begins to flash atany time, have the system checked by anauthorized dealer. If the brake warninglamp illuminates with the parking brakereleased, have the system checkedimmediately.
HINTS ON DRIVING WITH
ANTI-LOCK BRAKES
The anti-lock brake system does noteliminate the risks when:
•You drive too closely to the vehicle infront of you.
•Your vehicle is hydroplaning.
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•You take corners too fast.
•The road surface is poor.
Note: If the system activates, the brakepedal could pulse and may travel further.Maintain pressure on the brake pedal. Youmay also hear a noise from the system. Thisis normal.
PARKING BRAKE
Vehicles With AutomaticTransmission
WARNING: Always set the parkingbrake and leave your vehicle with thetransmission in park (P).
Note:If you park your vehicle on a hill andfacing uphill, shift into park (P) and turn thesteering wheel away from the curb.
Note:If you park your vehicle on a hill andfacing downhill, shift into park (P) and turnthe steering wheel toward the curb.
Vehicles with ManualTransmission
WARNING: Always set the parkingbrake fully and make sure you shift thegearshift lever to first gear. Switch theignition off and remove the key wheneveryou leave your vehicle.
Note:If you park your vehicle on a hill andfacing uphill, select first gear and turn thesteering wheel away from the curb.
Note:If you park your vehicle on a hill andfacing downhill, select reverse gear and turnthe steering wheel toward the curb.
To park your vehicle:
1.Apply the brake and shift into theneutral position.
2.Fully apply the parking brake, hold theclutch pedal down, then shift into first(1).
3.Turn the ignition off.
After you turn the engine off you can nowrelease the clutch pedal.
All Vehicles
WARNING: If the parking brake isfully released, but the brake warninglamp remains illuminated, the brakesmay not be working properly. Have yourvehicle checked as soon as possible.
To set the parking brake, pull the parkingbrake handle up as far as possible.
To release the parking brake:
1.Press and hold the button at the endof the parking brake handle.
2.Pull the handle up slightly, then pushthe handle down.
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To create or save MyMode, press thebutton on the steering wheel and accessthe menu. See General Information(page 98).The available systems display.Choose your desired settings using theappropriate buttons and menus. Press andhold OK to save your settings. MyModeadds to the drive mode list and you canselect the next time you drive your vehicle.
Note:The system has diagnostic checksthat continuously monitor the system tomake sure it properly operates. If a mode isunavailable due to a system fault or changein gear position, the selected mode defaultsto normal.
Note:Pre-Collision Assist automaticallydisables when you select track mode. SeePre-Collision Assist (page 203).
Note:If your vehicle has adaptive dampers,the steering setting optimizes to work witheach drive mode. Other steering settingsmay not be available.
Selectable Steering
Press the steering button on theinstrument panel to change thesteering feel. The first pressilluminates the selected mode. Each timeyou press the button, it changes the mode.
Modes:
•Normal - Default factory setting.
•Sport - Slightly higher effort requiredfor steering with more road force feltthrough the steering wheel.
•Comfort - Slightly less effort requiredfor steering with less road force feltthrough the steering wheel.
Note:You may feel a soft feedback bumpin the steering wheel after you make aselection.
Note:The steering setting defaults tonormal if you disconnect or remove thebattery.
Active Exhaust (If Equipped)
Use the information display toadjust the tone of the exhaust.
Active Exhaust modes:
•Quiet - Lowers the noise of the exhaust.
•Normal - Default factory setting.
•Sport - Raises the noise of the exhaust.
•Track - Tunes the exhaust for trackperformance.
Note:The track exhaust mode setting isonly for use at tracks and not for use onpublic roadways. Use of this setting resultsin increased exterior noise, which may notmeet state and local laws and regulations.It is the obligation of the driver to operatethe vehicle in a manner that complies withstate and local requirements. Only use thetrack exhaust mode setting at a competitiontrack or an off-road course where elevatedexterior vehicle noise is acceptable.
Rev Match (If Equipped)
This feature provides a smoother drivingexperience, particularly during a downshiftevent. You can accomplish this by a shiftposition prediction that commands a quickengine RPM match to the selected gear.You can switch this feature on and offthrough the information display. SeeGeneral Information (page 98).
Note:The system remembers your lastselection through ignition cycles.
Note:Rev match is only available with amanual transmission.
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When Towing a Trailer
•Do not drive faster than 70 mph(113 km/h) during the first 500 mi(800 km).
•Do not make full-throttle starts.
•Check your hitch, electrical connectionsand trailer wheel lug nuts thoroughlyafter you have traveled 50 mi (80 km).
•When stopped in congested or heavytraffic during hot weather, place thetransmission in park (P) or neutral (N)to aid engine and transmission coolingand to help air conditioningperformance.
•Switch off the speed control withheavy loads or in hilly terrain. Thespeed control may turn offautomatically when you are towing onlong, steep grades.
•Shift to a lower gear when driving downa long or steep hill. Do not apply thebrakes continuously, as they mayoverheat and become less effective.
•If your transmission is equipped with aGrade Assist or Tow/Haul feature, usethis feature when towing. This providesengine braking and helps eliminateexcessive transmission shifting foroptimum fuel economy andtransmission cooling.
•Allow more distance for stopping witha trailer attached. Anticipate stops andbrake gradually.
•Avoid parking on a slope. However, ifyou must park on a slope:
1.Turn the steering wheel to point yourvehicle tires away from traffic flow.
2.Set your vehicle parking brake.
3.Place the automatic transmission inpark (P) or manual transmission in alow gear.
4.Place wheel chocks in front and backof the trailer wheels. Chocks are notincluded with your vehicle.
Launching or Retrieving a Boat orPersonal Watercraft (PWC)
Note:Disconnect the wiring to the trailerbefore backing the trailer into the water.
Note:Reconnect the wiring to the trailerafter removing the trailer from the water.
When backing down a ramp during boatlaunching or retrieval:
•Do not allow the static water level torise above the bottom edge of the rearbumper.
•Do not allow waves to break higherthan 6 in (15 cm) above the bottomedge of the rear bumper.
Exceeding these limits may allow water toenter vehicle components:
•Causing internal damage to thecomponents.
•Affecting driveability, emissions, andreliability.
Any time the rear axle submerges in water,replace the rear axle lubricant. Water maycontaminate the rear axle lubricant, whichis not a normal maintenance inspectionitem unless there is a possibility of a leakor other axle repair is required.
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2023 Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-11-2022, enUSA, Edition date: 202209, First-PrintingTowing