2023 FORD BRONCO check engine

Engine compartment fuse box. See Locating the Under Hood Fuse Box (page341).F
Battery. See Charging the 12V Battery (page 364).G
Air filter assembly. See Changing the Engine Air Filter (page 359).H
UNDER HOOD OVERVIEW - 2.7L ECOBOOST™
Engine coolant reservoir. See Checking the Coolant (page 355).A
Windshield washer fluid reservoir. See Adding Washer Fluid (page 103).B
Engine oil filler cap. See Adding Engine Oil (page 354).C
Engine oil dipstick. See Engine Oil Dipstick Overview (page 354).D
Brake fluid reservoir. See Locating the Brake Fluid Reservoir (page 209).E
Engine compartment fuse box. See Locating the Under Hood Fuse Box (page341).F
Battery. See Changing the 12V Battery (page 362).G
Air filter assembly. See Changing the Engine Air Filter (page 359).H
352
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenanceE339862

UNDER HOOD OVERVIEW - 3.0L ECOBOOST™
Engine coolant reservoir. See Checking the Coolant (page 355).A
Windshield washer fluid reservoir. See Adding Washer Fluid (page 103).B
Engine oil filler cap. See Adding Engine Oil (page 354).C
Engine oil dipstick. See Engine Oil Dipstick Overview (page 354).D
Brake fluid reservoir. See Locating the Brake Fluid Reservoir (page 209).E
Engine compartment fuse box. See Locating the Under Hood Fuse Box (page341).F
Battery. See Changing the 12V Battery (page 362).G
Engine oil filter. See Motorcraft Parts (page 466).H
Air filter assembly. See Changing the Engine Air Filter (page 359).I
353
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenanceE360711

ENGINE OIL
ENGINE OIL DIPSTICK OVERVIEW
Minimum.A
Nominal.B
Maximum.C
CHECKING THE ENGINE OIL LEVEL
1.Make sure that your vehicle is on levelground.
2.Check the oil level before starting theengine, or switch the engine off afterwarm up and wait 15 minutes for theoil to drain into the oil pan.
Note:Checking the oil level too soon couldresult in an inaccurate reading.
3.Remove the dipstick and wipe it witha clean, lint-free cloth.
4.Reinstall the dipstick and make sure itis fully seated.
5.Remove the dipstick again to check theoil level.
Note: If the oil level is between themaximum and minimum marks, the oil levelis acceptable. Do not add oil.
6.If the oil level is at the minimum mark,immediately add oil.
7.Reinstall the dipstick. Make sure it isfully seated.
Note:The oil consumption of new enginesreaches its normal level after approximately3,000 mi (5,000 km).
Note:Increases in oil level can occur fromfrequent short trips that do not allow theengine to get to operating temperature, aswell as frequent idling or low speed drivingfor long periods of time.
Note:If oil levels are continuously notedabove the maximum mark, schedule a visitto your authorized dealer.
ADDING ENGINE OIL
WARNING: Do not remove the fillercap when the engine is running.
WARNING: Do not add engine oilwhen the engine is hot. Failure to followthis instruction could result in personalinjury.
Do not use supplemental engine oiladditives because they are unnecessaryand could lead to engine damage that thevehicle warranty may not cover.
1.Clean the area surrounding the engineoil filler cap before you remove it.
2.Remove the engine oil filler cap.
3.Add engine oil that meets ourspecifications. See Capacities andSpecifications (page 461).
4.Reinstall the engine oil filler cap. Turnit clockwise until you feel a strongresistance.
Note: Do not add oil further than themaximum mark. Oil levels above themaximum mark may cause engine damage.
Note:Immediately soak up any oil spillagewith an absorbent cloth.
354
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenanceE270482

RESETTING THE INTELLIGENT OILLIFE MONITOR
Use the instrument cluster display controlson the steering wheel to reset the oilchange reminder.
From the main menu scroll to:
Action and DescriptionMessage
Press the right arrow button,then from this menu scrollto the following message.
Settings
Press the right arrow button,then from this menu scrollto the following message.
VehicleMainten-ance
Press the right arrow button,then from this menu scrollto the following message.
Oil LifeReset
Press and hold the OKbutton until the instrumentcluster displays thefollowing message.
Hold OK toReset
Reset Successful
When the oil changereminder resets the instru-ment cluster displays 100%.
Remaining Life
{00}%
If the instrument clusterdisplays one of the followingmessages, repeat theprocess.
Not Reset
Reset Cancelled
ENGINE OIL CAPACITY ANDSPECIFICATION
For filling information, please refer to theCapacities and Specifications section ofyour owner's manual. See Engine OilCapacity and Specification (page 467).
CHECKING THE COOLANT
When the engine is cold, check theconcentration and level of the coolant atthe intervals listed in the scheduledmaintenance information. See ScheduledMaintenance (page 528).
Note:Make sure that the coolant level isbetween the minimum and maximum markson the coolant reservoir.
Note: Coolant expands when it is hot. Thelevel may extend beyond the MAX mark.
If the coolant level is at or below theminimum mark, add prediluted coolantimmediately.
Maintain coolant concentration within48% to 50%, which equates to a freezepoint between -29°F (-34°C) and -35°F(-37°C). Coolant concentration should bechecked using a refractometer. We do notrecommend the use of hydrometers orcoolant test strips for measuring coolantconcentration.
Adding Coolant
WARNING: Keep your hands andclothing clear of the cooling fan.
355
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenance

WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
WARNING: Do not add coolantwhen the vehicle is on or the coolingsystem is hot. Failure to follow thisinstruction could result in personal injury.
WARNING: Do not add coolantfurther than the MAX mark.
WARNING: Do not put coolant inthe windshield washer reservoir. Ifsprayed on the windshield, coolant couldmake it difficult to see through thewindshield.
WARNING: Do not allow the fluidto touch your skin or eyes. If thishappens, rinse the affected areasimmediately with plenty of water andcontact your physician.
Note: Do not use stop leak pellets, coolingsystem sealants, or non-specified additivesas they can cause damage to the enginecooling or heating systems. Resultingcomponent damage may not be covered bythe vehicle Warranty.
Note:Automotive fluids are notinterchangeable.
It is very important to use predilutedcoolant approved to the correctspecification in order to avoid plugging thesmall passageways in the engine coolingsystem. See Capacities andSpecifications (page 461). Do not mixdifferent colors or types of coolant in yourvehicle. Mixing of engine coolants or usingan incorrect coolant may harm the engineor cooling system components and couldvoid the vehicle Warranty.
Note:If prediluted coolant is not available,use the approved concentrated coolantdiluting it to 50/50 with deionized ordistilled water. See Capacities andSpecifications (page 461). Using water thathas not been deionized may contribute todeposit formation, corrosion and pluggingof the small cooling system passageways.
To top up the coolant level do thefollowing:
1.Unscrew the cap slowly. Any pressureescapes as you unscrew the cap.
2.Add enough prediluted coolant toreach the correct level.
Note:We do not recommend the use ofrecycled coolant.
3.Replace the coolant reservoir cap. Turnthe cap clockwise until it contacts thehard stop.
4.Check the coolant level in the coolantreservoir the next few times you driveyour vehicle. If necessary, repeat step2.
If you have to add more than 1.1 qt (1 L) ofengine coolant per month, have yourvehicle checked as soon as possible.Operating an engine with a low level ofcoolant can result in engine overheatingand possible engine damage.
In case of emergency, you can add a largeamount of water without engine coolantin order to reach a vehicle service location.Service your vehicle as soon as possible.
356
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenance

Continued operation increases the enginetemperature, causing the engine tocompletely shut down. Your steering andbraking effort increases in this situation.
When the engine temperature cools, youcan re-start the engine. Have your vehiclechecked as soon as possible to minimizeengine damage.
When Fail-Safe Mode Is Activated
WARNING: Fail-safe mode is foruse during emergencies only. Operateyour vehicle in fail-safe mode only aslong as necessary to bring your vehicleto rest in a safe location and seekimmediate repairs. When in fail-safemode, your vehicle will have limitedpower, will not be able to maintainhigh-speed operation, and maycompletely shut down without warning,potentially losing engine power, powersteering assist, and power brake assist,which may increase the possibility of acrash resulting in serious injury.
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
Your vehicle has limited engine powerwhen in the fail-safe mode, drive yourvehicle with caution. Your vehicle does notmaintain high-speed operation and theengine could operate poorly.
Remember that the engine is capable ofautomatically shutting down to preventengine damage. In this situation:
1.Pull off the road as soon as safelypossible and switch the engine off.
2.If you are a member of a roadsideassistance program, we recommendthat you contact your roadsideassistance service provider.
3.If this is not possible, wait for a shortperiod of time for the engine to cool.
4.Check the coolant level. If the coolantlevel is at or below the minimum mark,add prediluted coolant immediately.
5.When the engine temperature cools,you can re-start the engine. Have yourvehicle checked as soon as possible tominimize engine damage.
Note:If you continue to drive your vehiclein fail-safe mode without repairing it, youwill damage your engine.
Engine Coolant TemperatureManagement (If Equipped)
WARNING: To reduce the risk ofcrash and injury, be prepared that thevehicle speed may reduce and thevehicle may not be able to acceleratewith full power until the coolanttemperature reduces.
If you tow a trailer with your vehicle, theengine may temporarily reach a highertemperature during severe operatingconditions, for example ascending a longor steep grade in high ambienttemperatures.
At this time, you may notice the coolanttemperature gauge moves toward the redzone and a message may appear in theinformation display.
358
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenance

You may notice a reduction in vehiclespeed caused by reduced engine power inorder to manage the engine coolanttemperature. Your vehicle may enter thismode if certain high-temperature andhigh-load conditions take place. Theamount of speed reduction depends onvehicle loading, grade and ambienttemperature. If this occurs, there is noneed to stop your vehicle. You cancontinue to drive.
The air conditioning may automaticallyturn on and off during severe operatingconditions to protect the engine fromoverheating. When the coolanttemperature decreases to the normaloperating temperature, the air conditioningturns on.
If the coolant temperature gauge movesfully into the red zone, or if the coolanttemperature warning or service enginesoon messages appear in your informationdisplay, do the following:
1.Stop your vehicle as soon as it is safeto do so. Fully apply the parking brake,shift into park (P) or neutral (N).
2.Leave the engine running until thecoolant temperature gauge needlereturns to the normal position. If thetemperature does not drop afterseveral minutes, follow the remainingsteps.
3.Switch the engine off and wait for it tocool. Check the coolant level.
4.If the coolant level is at or below theminimum mark, add prediluted coolantimmediately.
5.If the coolant level is normal, restartthe engine and continue.
CHANGING THE ENGINE AIR
FILTER - 2.3L ECOBOOST™/
2.7L ECOBOOST™
WARNING: To reduce the risk ofvehicle damage and personal burninjuries, do not start your engine with theair cleaner removed and do not removeit while the engine is running.
Change the air filter element at the properintervals. See Scheduled Maintenance(page 528).
When changing the air filter element, useonly the air filter element listed. SeeCapacities and Specifications (page461).
Note:Failure to use the correct air filterelement could result in severe enginedamage that the vehicle Warranty may notcover.
Note: When servicing the air cleaner, donot allow foreign material to enter the airinduction system. The engine is susceptibleto damage from even small particles.
359
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenance

DetailsMessage
The battery management system determines that the 12Vbattery is at a low state of charge. Start the engine to chargethe battery or charge the battery using an aftermarket batterycharger. Always use the vehicle ground point when connectingthe negative cable of the external battery charger. See JumpStarting the Vehicle (page 330). This message clears onceyou restart your vehicle and the battery state of charge hasrecovered. Do not switch on the ignition when a batterycharger is in use to charge the battery.
Battery State of ChargeLow
The battery management system determines that the batteryis at a low state of charge. Turn the ignition off as soon aspossible to protect the battery. This message will clear oncethe vehicle has been started and the battery state of chargehas recovered. Turning off unnecessary electrical loads willallow faster battery state-of-charge recovery.
Turn Power Off To SaveBattery
Displayed when the battery management system detects anextended low-voltage condition. Various vehicle features willbe disabled to help preserve the battery. Turn off as many ofthe electrical loads as soon as possible to improve systemvoltage. If the system voltage has recovered, the disabledfeatures will operate again as normal.
Electrical Power SaverActive Some FeaturesTurned Off See Manual
ADJUSTING THE HEADLAMPS
Vertical Aim Adjustment
The headlamps on your vehicle areproperly aimed at the assembly plant. Ifyour vehicle has been in an accident,contact an authorized dealer to have yourvehicle headlamps checked for properalignment.
Headlamp Aiming Target
8 ft (2.4 m).A
Center height of lamp to ground.B
25 ft (7.6 m).C
Horizontal reference line.D
365
2023 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202208, DOMMaintenanceE142592