2019 FORD F-53 bulb

If the light remains on while the engine isrunning, this indicates inadequate hydraulicbooster pressure or reserve pump systemfailure. Stop the vehicle as soon aspossible and seek service immediately byyour authorized dealer.
Cruise Control Indicator
Illuminates when you switch thisfeature on. See Using CruiseControl (page 43).
Direction Indicator
Illuminates when the left or rightdirection indicator or the hazardwarning flasher is turned on. Ifthe indicators stay on or flash faster, checkfor a burned out bulb.
Electronic Throttle Control
Illuminates when the engine hasdefaulted to a limp-homeoperation. See your authorizeddealer as soon as possible.
Fasten Seatbelt Warning Lamp
It illuminates and a chimesounds until you fasten theseatbelts.
Headlamp High Beam Indicator
Illuminates when you switch thehigh beam headlamps on. It willflash when you use theheadlamp flasher.
Service Engine Soon
If it illuminates when the engineis running this indicates amalfunction. The On BoardDiagnostics system has detected amalfunction of the vehicle emission controlsystem.
If it flashes, engine misfire may beoccurring. Increased exhaust gastemperatures could damage the catalyticconverter or other vehicle components.Drive in a moderate fashion (avoid heavyacceleration and deceleration) and haveyour vehicle immediately serviced.
It illuminates when you switch the ignitionon prior to engine start to check the bulband to indicate whether your vehicle isready for Inspection and Maintenance(I/M) testing.
Normally, it illuminates until the engine iscranked and automatically turns off if nomalfunctions are present. However, if after15 seconds it flashes eight times, thisindicates that your vehicle is not ready forInspection and Maintenance (I/M) testing.See Emission Law (page 34).
Tow Haul Indicator
Illuminates when the tow/haulfeature has been activated. If thelight flashes steadily, have thesystem serviced immediately, damage tothe transmission could occur.
AUDIBLE WARNINGS AND
INDICATORS
Fail-Safe Cooling Warning Chime
Sounds when the coolant gauge pointerhas moved to hot. There are three stagesof chimes:
19
Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 201803, Third-Printing-Instrument ClusterE71340 E71880 E161509

Illumination of the service engine soonindicator, charging system warning light orthe temperature warning light, fluid leaks,strange odors, smoke or loss of enginepower could indicate that the emissioncontrol system is not working properly.
An improperly operating or damagedexhaust system may allow exhaust toenter the vehicle. Have a damaged orimproperly operating exhaust systeminspected and repaired immediately.
Do not make any unauthorized changes toyour vehicle or engine. By law, vehicleowners and anyone who manufactures,repairs, services, sells, leases, tradesvehicles, or supervises a fleet of vehiclesare not permitted to intentionally removean emission control device or prevent itfrom working. Information about yourvehicle’s emission system is on the VehicleEmission Control Information Decallocated on or near the engine. This decalalso lists engine displacement.
Please consult your warranty informationfor complete details.
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 31).
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.
36
Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 201803, Third-Printing-Engine Emission Control

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.
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.
37
Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 201803, Third-Printing-Engine Emission Control