2019 VOLVO S90 TWIN ENGINE check engine light

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YOUR VOLVO
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goal. In addition to continuous environmentalrefinement of conventional gasoline-poweredinternal combustion engines, Volvo is activelylooking at advanced technology alternative-fuelvehicles.
When you drive a Volvo, you become our partnerin the work to lessen the vehicle's impact on theenvironment. To reduce your vehicle's environ-mental impact, you can:
Maintain proper air pressure in your tires.Tests have shown decreased fuel economywith improperly inflated tires.
Follow the recommended maintenanceschedule in your Warranty and ServiceRecords Information booklet.
Drive at a constant speed whenever possible.
See a trained and qualified Volvo servicetechnician as soon as possible for inspectionif the check engine (malfunction indicator)light illuminates, or stays on after the vehiclehas started.
Properly dispose of any vehicle-related wastesuch as used motor oil, used batteries, brakepads, etc.
When cleaning your vehicle, please use gen-uine Volvo car care products. All Volvo carcare products are formulated to be environ-mentally friendly.

Twin Engine vehicles
If possible, precondition the vehicle with thecharging cable before driving.
If preconditioning is not possible in coldweather, use the seat and steering wheelheating primarily. Avoid heating the entirepassenger compartment, which reduces thehybrid battery's charge level.
Choose the Pure drive mode to help mini-mize electric power consumption.
In hilly terrain, put the gear selector in modeB to utilize the electric motor's braking func-tion when the accelerator pedal is released.This helps charge the hybrid battery.

Related information
Economical driving (p. 453)
Starting and stopping preconditioning(p. 225)
Air quality (p. 198)
IntelliSafe - driver support
IntelliSafe is Volvo Cars' philosophy regardingvehicle safety. IntelliSafe consists of a number ofsystems, both standard and optional, that aredesigned to help make driving safer, preventaccidents and protect passengers and otherroad users.
Support
IntelliSafe includes driver support functions suchas Adaptive cruise control* which helps the driverto maintain an even speed combined with a pre-selected time interval to the vehicle ahead.
Pilot Assist2 helps the driver keep the vehicle inthe current traffic lane by providing steeringassistance and maintaining an even speed and aset time interval to the vehicle ahead.
Park Assist Pilot* helps the driver pull into andout of parking spaces.
Other examples of systems that can help thedriver are the Active main beam, Cross TrafficAlert (CTA)* and Blind Spot Information (BLIS)*systems.

Prevention
City Safety is a function intended to help preventaccidents. The function can help prevent or miti-gate a collision with pedestrians, cyclists, largeanimals or other vehicles. Light, sound and pulsa-tions in the brake pedal are provided to alert of a
2Depending on market, this function can be either standard or optional.

DISPLAYS AND VOICE CONTROL
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Symbol Meaning
A
B
Fault in ABS system
If this symbol is illuminated, theABS system is malfunctioning. Thevehicle's regular brakes will stillwork, but without the ABS function.
A
B
Auto-brake on
This symbol illuminates when thefunction is activated and the brakesor parking brakes are being used.The brakes hold the vehicle at astandstill after it has stopped.
Symbol Meaning
Tire pressure system
This symbol illuminates to indicatelow tire pressure. If there is a faultin the tire pressure system, thesymbol will first flash for approxi-mately 1 minute and then glowsteadily. This may occur if the sys-tem cannot detect or alert thedriver of low tire pressure asintended.
Emission control system
If this symbol illuminates after star-ting the engine, it could indicate afault in the vehicle's emission con-trol system. Have the vehiclechecked by a workshop. Volvo rec-ommends contacting an authorizedVolvo workshop.
Left/right turn signals
These symbols flash when the turnsignals are used.
Symbol Meaning
Parking lights
This symbol illuminates when theparking lights are on.
Fault in headlight system
This symbol illuminates if a faulthas been detected in the ABL(Active Bending Lights) function oranother fault in the headlight sys-tem.
Active high beams on
This symbol lights up in blue whenthe active high beams are on.
Active high beams off
This symbol lights up in white whenthe active high beams are off.
High beams on
This symbol illuminates when thehigh beams are on or flashed.
Active high beams on
This symbol lights up in blue whenthe active high beams are on. Park-ing lights are on.

DRIVER SUPPORT
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Electronic Stability Control symbolsand messages
A number of symbols and messages related toElectronic Stability Control (ESC) may be dis-played in the instrument panel.
Some examples of symbols and messages areshown in the table below.
Symbol MessageMeaning
Steady glow forapprox. 2 seconds.System check when the engine is started.
Flashing light.The ESC is actively operating.
Steady glow.Sport mode is activated.
Note: The ESC system is not deactivated in this mode, but has partially reduced functionality.
ESC
Temporarily off
The ESC system's functionality has been temporarily reduced due to high brake system temperatures. Thefunction will be automatically reactivated when the brakes have cooled.
See the message in the instrument panel.
ESC
Service required
The ESC system is not functioning properly.
Stop the vehicle in a safe place, turn off the engine and then restart it.
Consult a workshop if the message persists ‒ an authorized Volvo workshop is recommended.
A text message can be erased by briefly pressing
the button in the center of the right-sidesteering wheel keypad.
If the message persists: Contact a workshop ‒ anauthorized Volvo workshop is recommended.

Related information
Electronic Stability Control (p. 271)

STARTING AND DRIVING
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Brakes
The brake pedal is used to apply the vehicle'sregular brakes, which are part of the brake sys-tem.
The vehicle is equipped with two brake circuits. Ifone brake circuit is damaged, the brake pedal willgo down further when depressed. More pressurewill then be required from the driver for normalbraking effect.

WARNING
The power brakes only work when the electricmotor or combustion engine is running.
If the brake pedal is used when the engine isswitched off, greater pressure must be applied tobrake the vehicle.
In very hilly areas or when driving with a heavyload, gear position B can be used to augment thebrakes with engine braking.

Anti-lock brakes
The vehicle is equipped with an Anti-lock BrakingSystem (ABS), which helps prevent the wheelsfrom locking and helps maintain steering controlwhen braking. Vibrations may be felt from thebrake pedal when ABS is operating, which is nor-mal.
After the vehicle is started, a brief test of theABS system is automatically performed when the
driver releases the brake pedal. An additionalautomatic test of the system may be performedwhen the vehicle is traveling at a low speed. Dur-ing the test, the brake pedal may feel as though itis pulsating.
Light braking charges the hybrid battery
When the brakes are applied lightly, the electricmotor braking function is used. This converts thevehicle's kinetic energy into electrical energy,which is used to charge the hybrid battery. Whenthe battery is being charged with the electricmotor braking function, this will be indicated inthe instrument panel.
When the battery is being charged with the electricmotor braking function, this will be indicated in theinstrument panel.
This function is active at speeds in the range of150-5 km/h (93-3 mph). When braking atspeeds outside of this range, or during harderbraking, the hydraulic braking system is used to
augment braking. This is indicated in the instru-ment panel with the pointer down in the red area.
Symbols in the instrument panel
Symbol Meaning
A
B
Check the brake fluid level. If thelevel is low, fill brake fluid andcheck to determine the reason forthe loss of brake fluid.
A
B
Fault in pedal sensor.

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STARTING AND DRIVING
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Symbol Meaning
A
B
Steady glow for 2 seconds afterthe engine is started: Automaticfunction check.
Steady glow for more than 2 sec-onds: Fault in the ABS system. Thevehicle's regular brake system isstill working, but without the ABSfunction.
If the message Brake pedal Cha-racteristics changed Servicerequired is displayed, the "Brake-by-wire" system is not functioningproperly. Greater pressure will berequired to brake the vehicle.
AIn Canada.BIn the US.

WARNING
If the warning symbols for both brake faultand ABS fault are lit simultaneously, theremay be a fault in the brake system.
If the brake fluid reservoir level is normalwhen this occurs, drive carefully to thenearest workshop to have the brake sys-tem checked - an authorized Volvo work-shop is recommended.
If the brake fluid has fallen below the MINlevel in the brake fluid reservoir, the vehi-cle should not be driven until the brakefluid has been filled. The reason for thebrake fluid loss must be checked.

Related information
Brake Assist System (p. 432)
Auto-hold brakes (p. 437)
Hill Start Assist (p. 439)
Braking on wet roads (p. 433)
Braking on salted roads (p. 433)
Maintenance of the brake system (p. 433)
Brake lights (p. 156)
Brake Assist System
The brake enhancing system, Brake AssistSystem (BAS), helps increase braking force andthereby reduce braking distance.
The system monitors the driver's braking habitsand increases braking force when necessary.Braking force can be increased up to the point atwhich the ABS intervenes. The function is deacti-vated when pressure on the brake pedal isdecreased.
Related information
Brakes (p. 431)

STARTING AND DRIVING
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Charge
Engine charges hybridbattery.
This function charges thehybrid battery with the help ofthe combustion engine forincreased use of the electricmotor at a later time.

Symbols in the instrument panel
The symbol is displayed in the hybrid battery gaugewhen Hold is activated.
The symbol is displayed in the hybrid battery gaugewhen Charge is activated.

Related information
Using the electric motor only (p. 454)
Economical driving (p. 453)
Hybrid gauge (p. 83)
Preparing for a long trip
It is important to have the vehicle's systems andequipment checked carefully before driving longdistances.
Check that:
the engine is running properly and that fuelconsumption is normal
there are no leaks (fuel, oil or other fluid)
the brake pedal is functioning optimally
all lights are working ‒ adjust the headlightheight if the vehicle is carrying a heavy load
tire tread depth and air pressure are at cor-rect levels. Change to snow tires when driv-ing in areas where there is a risk of snowy oricy roads
the start battery is sufficiently charged
the wiper blades are in good condition

Related information
Checking tire pressure (p. 549)
Filling washer fluid (p. 635)
Winter driving (p. 458)
Economical driving (p. 453)
Vehicle modem settings (p. 527)
Loading recommendations (p. 580)
Pilot Assist (p. 308)
Speed limiter (p. 275)
Tire sealing system (p. 564)

STARTING AND DRIVING
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CAUTION
Parts of the vehicle (e.g. engine, transmission,driveline, electrical components, etc.) can bedamaged if the vehicle is driven through waterhigher than its floor level. Damage to anycomponents caused by flooding, vapor lock orinsufficient oil is not covered under warranty.
If the engine stalls while the vehicle is inwater, do not attempt to restart it. Have thevehicle towed on the bed of a tow truck to aworkshop - an authorized Volvo workshop isrecommended.

CAUTION
Because it can be difficult to determine thewater depth, avoid driving through standing orrunning water.
When you have passed the water, press lightly onthe brake pedal and check that the brakes arefunctioning properly. Water, mud, slush, etc. canmake the brake linings slippery, resulting indelayed braking effect.
If the vehicle is equipped with a trailer couplingcontact, clean the contact after driving in water ormud.

Related information
Recovery (p. 470)
Opening/closing the fuel filler door
A button on the instrument panel is used tounlock the fuel filler door.
An arrow next to the fuel pumpsymbol in the instrument panelindicates the side of the vehicleon which the fuel filler door islocated.
1. Press the button on the dashboard.
> Pressure equalization in the fuel tank cau-ses a slight delay before the fuel fillerdoor opens. Fuel tank Fuel lid isopening will be displayed in the instru-ment panel, followed by Fuel tank Readyfor refueling.

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the emission control system and could result inloss of emission warranty coverage. State andlocal vehicle inspection programs will makedetection of misfueling easier, possibly resultingin emission test failure for misfueled vehicles.

NOTE
Some U.S. and Canadian gasolines contain anoctane enhancing additive called methyl-cyclopentadienyl manganese tricarbonyl(MMT). If such fuels are used, your EmissionControl System performance may be affected,and the Check Engine Light (malfunctionindicator light) located on your instrumentpanel may light. If this occurs, please returnyour vehicle to a trained and qualified Volvoservice technician for service.

Gasoline containing alcohol and ethers,
"Oxygenated fuels"
Some fuel suppliers sell gasoline containing"oxygenates" which are usually alcohols orethers. In some areas, state or local laws requirethat the service pump be marked indicating useof alcohols or ethers. However, there are areas inwhich the pumps are unmarked. If you are notsure whether there is alcohol or ethers in thegasoline you buy, check with the service stationoperator. To meet seasonal air quality standards,some areas require the use of "oxygenated" fuel.
Volvo permits the use of the following "oxygen-ated" fuels. However, the specified octane ratingsmust still be met.
Alcohol - Ethanol
Fuels containing up to 10% ethanol by volumemay be used. Ethanol may also be referred to asEthyl alcohol, or "Gasohol".
Ethers - MTBE/ETBE: Fuels containing up to22% MTBE/ETBE by volume may be used.

Methanol
Do not use gasolines containing methanol(methyl alcohol, wood alcohol). This practice canresult in vehicle performance deterioration andcan damage critical parts in the fuel system. Suchdamage may not be covered under the NewVehicle Limited Warranty.

Related information
Octane rating (p. 462)
Opening/closing the fuel filler door (p. 459)
Refueling (p. 460)
Emission controls (p. 464)
Octane rating
Volvo requires premium fuel (91 octane5 orhigher) for all T5, T6 and T8 engines, and rec-ommends AKI 93 for optimal performance andfuel economy. See decal examples in illustra-tions 1 and 2.
5AKI (Anti Knock Index) is an average value of RON (Research Octane Number) and MON (Motor Octane Number) - (RON)+(MON)/2