2020 VOLKSWAGEN TRANSPORTER check engine light

Capacities
r--('n First read and observe the introductory L-W.I information and safety warnings & on page 340.
Checks when filling the tank
r--r'n First read and observe the introductory L-W.I information and safety warnings & on page 340.
Checklist
Never carry out any work on the engine or in the engine compartment if you are not familiar with the necessary procedures and the general safety re-quirements or if the correct operating equipment, fluids and unsuitable tools are not available 350, Preparation for working in the engine compartment! The work should be carried out by a qualified workshop if you are uncertain. Please en-sure that the following are checked regular1y, pref-erably every time you fill the tank:
..( Windscreen washer fluid level 116
..( Engine oil level 353
Fuel
c:QJ Introduction
This chapter contains information on the following subjects:
Petrol
Diesel ...
344 345
Different engines require different fuels. The facto-ry-fitted sticker on the inside of the tank flap indi-cates the fuel type that is required for your particu-lar vehicle.
Volkswagen Commercial Vehicles recommends us-ing fuels with a low sulphur content or which are sulphur-free in order to reduce fuel consumption and prevent damage to the engine.
If the engine is not running smoothly or begins to judder, this can indicate poor or inadequate fuel quality, e.g. water in the fuel. If these symptoms appear, reduce the vehicle speed immediately and drive to the nearest qualified workshop at medium engine speeds, avoiding high engine loading. If these symptoms occur immediately after the vehi-
Fuel tank capacity
Approx. 80.0 I,
..( Engine coolant level 358
..( Brake fluid level 269
..( Tyre pressure 367
..( Vehicle lighting necessary for traffic safety:
-Turn signals
-Side lights, dipped beam headlights and main beam headlights
-Tail light cluster
-Brake lights
-Rear fog light 1 08
Information on changing bulbs 432.
cle has been refuelled, switch the engine off as soon as it is safe to do so and seek expert assis-tance. This can help to prevent further damage.
Additional information and warnings:
• Filling the tank 340
• Engine management system and exhaust puri-fication system 407
• Service schedule
A WARNING
Incorrect handling of fuel can cause explo-sions, fire, serious burns and other injuries.
• Fuel is highly explosive and inflammable.
• Never handle fuel near open flames, sparks or glowing matter (e.g. cigarettes).
• Keep naked flames, hot parts and sparks at a safe distance.
At the filling station 1343

CD
• Your vehicle is not suitable for use with bio-diesel and must not be filled up or driven with biodiesel. Failure to observe this point can re-sult in damage to the fuel system and engine.
• Some diesel manufacturers blend biodiesel with diesel fuel in compliance with European Standard 590 or an equivalent standard (in Ger-many). Use of this diesel is allowed and will not damage the engine or fuel system.
• The diesel engine has been developed for use with diesel only. For this reason, petrol, heating oil or other unsuitable fuels may not be used. These fuels can cause serious damage to the fuel system and engine.
CD
• The service life of the diesel particulate filter can be reduced considerably if diesels with a high sulphur content are used. A Voikswagen Commercial Vehicles dealership will be able to tell you which countries have diesel with a high sulphur content. Emission control system for diesel vehicles (AdBiue®)
o:::n Introduction
This chapter contains information on the following subjects:
Warning and indicator lamps Refilling Ad Blue® ... 347
348
SCR catalysts can be used to reduce emissions from diesel engines (SCR = Selective Catalytic Re-duction). The SCR catalyst uses Ad Blue® urea sol-ution to convert nitrogen oxides into nitrogen and water.
If the vehicle is equipped with this kind of emission control system for diesel vehicles, the filler neck for the Ad Blue® tank is located below the filler cap for the fuel tank.
The Ad Blue® level should be checked within the scope of the service work Service schedule.
Information on AdBiue®
The Ad Blue® consumption figures depend on the individual driving style, the system's operating tem-perature and the ambient temperature that the ve-hicle is operated in.
The vehicle is fitted with a separate tank for Ad Bl-ue®. The Ad Blue® tank holds approximately 13 li-tres. For technical reasons, the capacity may be slightly larger when refilling using refill bottles.
The Ad Blue® tank must never run empty. As of a remaining distance of approximately 2,400 km. the instrument cluster display will indicate that the
346 While drivmg
Ad Blue® must be refilled 348. If the re-maining range is 0 km, the engine cannot be star-ted anymore 347.
The Ad Blue® trademark is held by the German As-sociation of the Automobile Industry (VDA) in the USA, Germany, the European Union and other countries.
Additional information and warnings:
• Fuel 343
• Accessories, modifications, repairs and renewal of parts 394
A WARNING
If the AdBiue® level is too low, the vehicle cannot be restarted after the Ignition has been switched off. Starting with jump leads is also not possible.
• Refill AdBiue® at the latest when the re-maining distance reaches approximately 1,000 km.
• Never allow the Ad Blue® tank to run emp-ty.
A WARNING
Ad Blue® is an Irritant and corrosive fluid that can damage the skin, eyes and breathing passages upon contact.

A WARNING (Continued)
• If Ad Blue® gets Into the eyes or onto the skin, Immediately wash the area with lots of water for at least 15 minutes and consult a doctor.
• If Ad Blue® is swallowed, Immediately rinse the mouth out with lots of water for at least 15 minutes. Do not induce vomiting un-less Instructed to do so by a doctor. Seek medical assistance Immediately.
Warning and indicator lamps
CD
Ad Blue® can corrode surfaces such as painted vehicle parts, plastics, clothing and carpets. Remove any spiltAdBiue® as quickly as possi-ble with a damp cloth and plenty of cold water.
• If the Ad Blue® has already formed crystals, use warm water and a sponge to remove. m First read and observe the Introductory Information and safety warnings & on page 346.
Lit up Possible Solution
OG The engine cannot be restarted! AdBI-Park the vehicle in a suitable. flat location and refill the minimum amount of Ad Blue® ue® level too low. 348.
OG
with The engine cannot be restarted! Fault in the Ad Blue® system. Go to a qualified workshop. Have the system checked.
,.,..,c
Ad Blue® level is low. Refill Ad Blue® before the kilometres displayed
r drop to zero 348.
with Ad Blue® system faulty or not refilled using norm-standard Ad Blue®_ Go to a qualified workshop. Have the system checked.
,.,..,c
OG Ad Blue® level is low. Refill Ad Blue® before the kilometres displayed drop to zero 348.
OG
with Ad Blue® system faulty or not refilled using Go to a qualified workshop. Have the system norm-standard Ad Blue®.
,.,..,c
Several warning and indicator lamps will light up briefly as a functional check when the ignition is switched on. They will go out after a few seconds.
A WARNING
Failure to observe illuminated warning lamps and text messages can lead to your vehicle breaking down in traffic, and can cause acci-dent and serious injury.
checked.
A WARNING (Continued)
• Never ignore any illuminated warning lamps or text messages.
• Stop the vehicle as soon as possible and when safe to do so.
CD
Failure to observe illuminated Indicator lamps and text messages can lead to your vehicle be-Ing damaged. At the filling station 347

Warning lamp and coolant temperature display
Fig. 276 In the instrument cluster: coolant temper-ature display with cold range @, normal range ® warning range @.
Needle posi-Lit up tion Possible cause =>Fig. 276
© Coolant temperature too Warning area high.
® Coolant level too low. Normal area
r-f"n First read and observe the introductory L,....J.:.lJ Information and safety warnings & on page 358.
In normal driving conditions, the needle will be in the middle section of the scale. The temperature may also rise when the engine is working hard, es-pecially at high ambient temperatures.
Several warning and indicator lamps will light up briefly as a functional check when the ignition is switched on. They will go out after a few seconds.
Solution
t Do not drive on! Stop the vehicle as soon as possible and when safe to do so. Stop the engine, let the engine cool down until the needle is back in the normal area. Check the coolant level =>page 361.
After the engine has cooled down, check the coolant level and refill engine coolant if the level is too low =>page 361. There is a fault if the coolant level is correct.
Fault in the coolant system. ·t Do not drive on! --Seek expert assistance.
--® Cold area --
Flashes Possible cause
Fault in the coolant system.
A WARNING
Failure to observe illuminated warning lamps and text messages can lead to your vehicle breaking down In traffic, and can cause acci-dent and serious injury.
• Always heed illuminated warning lamps and text messages.
Avoid high engine revs and heavy engine loads until the engine is warm.
Solution
Seek expert assistance.
A WARNING (Continued)
• Never ignore any illuminated warning lamps or text messages.
• Stop the vehicle as soon as possible and when safe to do so.
CD
Failure to observe illuminated indicator lamps and text messages can lead to your vehicle be-ing damaged. In the engine compartment I 359

Checking the coolant level and refilling coolant
Fig. 277 In the engine compartment: markings on the coolant expansion tank.
r--f'n First read and observe the Introductory information and safety warnings & on page 358.
The warning lamp for the engine coolant will light up if the engine coolant level is too low.
Preparation
• Park the vehicle on a firm and level surface.
• Allow the engine to cool down &.
• Open the bonnet&. 350.
• The coolant expansion tank has the all. symbol on its cap 278.
Checking the coolant level
• When the engine is cold, check the coolant lev-el on the side markings of the engine coolant ex-pansion tank 277.
• Refill the coolant if the liquid level is below the minimum marking ("min"). When the engine is warm, the coolant level may be slightly above the top end of the marked area.
Refilling coolant
• Always protect your face, hands and arms from hot coolant or steam by placing a suitable cloth on the cap of the coolant expansion tank.
• Unscrew the cap carefully &.
• Refill only new coolant according to the Volks-wagen specification 360)
• Only top up coolant if there is coolant residue in the expansion tank. If this is not observed, the en-gine could be damaged. If you cannot see any coolant in the expansion tank do not drive on. Seek professional assistance.
Fig. 278 In the engine compartment: coolant ex-pansion tank cap.
• If you can see coolant residue in the expansion tank, top up coolant until the level remains stable.
• The coolant level must be between the marks on the engine coolant expansion tank 277. Do not fill up over the top line of the marked area
• Close the cap tightly.
• If in an emergency you do not have access to the coolant of the required specification 360), do not use any other coolant addi-tive. Instead, initially refill with distilled water only. Then add the correct proportion of coolant ad-ditive as soon as possible 360.
A WARNING
Hot steam or engine coolant can cause seri-ous burns.
• Never open the bonnet if you can see or hear steam or engine coolant coming out of the engine compartment. Always wait until no escaping steam or coolant can be seen or heard.
• Always allow the engine to cool down completely before carefully opening the bon-net. Hot components can burn the skin.
• The following points should be noted be-fore opening the bonnet once it has cooled down.
-Apply the handbrake fully and move the selector lever to position P or move the manual gear lever to the neutral position.
-Remove the vehicle key from the lgni-
In the engine compartment I 361

Explanation of the warnings on the vehicle battery
Symbol Meaning
Always wear eye protection!
Electrolyte is very corrosive and caustic. Always wear protective gloves and eye protection!
No fires, sparks, naked lights or smoking!
A highly explosive mixture of gases is given off when the vehicle battery is charging!
Always keep children away from acid and the vehicle battery!
Additional information and warnings:
• Additional batteries, California 192
• Pull-away assist systems (starUstop system) 282
• Preparation for working in the engine compart-ment 350
• Accessories, modifications, repairs and renewal of parts 394
• Service schedule
A WARNING
Any work on the vehicle battery and the elec-trical system can cause serious chemical burns, fire or electric shocks. Always read the following warnings and safety informa-tion before carrying out any kind of work:
• Switch off the ignition and all electrical consumers before carrying out any work on the vehicle battery and also disconnect the negative cable from the vehicle battery.
• Children should always be kept away from electrolyte and the vehicle battery.
• Always wear eye protection.
• Electrolyte Is very aggressive. lt can burn the skin and can cause blindness. When working with the battery, ensure that your hands, arms and face in particular are protec-ted from acid spillages.
A WARNING (Continued)
• Do not smoke during the work, and never work near naked flames or sparks.
• When handling cables and electrical equipment, avoid generating sparks and elec-trostatic charge.
• Never short circuit the battery poles.
• Never use a damaged vehicle battery. it can explode. Damaged vehicle batteries must be replaced as soon as possible.
• Damaged or frozen vehicle batteries must be replaced immediately. Discharged vehicle batteries can even freeze at temperatures of around ooc (+32°F).
• In vehicles with a second battery under the driver's seta or a third battery in the lug-gage compartment, ensure that the gas dis-charge hose is connected properly to the ve-hicle battery.
• Do not allow direct sunlight onto the vehicle battery for an extended period as the UV rays could damage the battery housing.
• If the vehicle is left standing in cold condi-tions for a long period, protect the vehicle bat-tery from frost. If it freezes it wilt be damaged.
• Vehicles with a starUstop system are fitted with a special vehicle battery. The installation of a different vehicle battery could cause prob-lems with the vehicle electronics. When replac-ing the vehicle battery, only insert a battery with specifications that correspond exactly with those of the original battery.
W After starting the engine with a discharged L!J vehicle battery, or after the battery has been changed, system settings (time, date, personal convenience settings and programming) may have been changed or deleted. Check and correct the settings as necessary once the vehicle battery has been sufficiently charged. In the engine compartment 363

Warning lamp
ro First read and observe the Introductory Information and safety warnings & on page 362.
Lit up Possible cause
0 Fault in the alternator.
Several warning and indicator lamps will light up briefly as a functional check when the ignition is switched on. They will go out after a few seconds.
A WARNING
Failure to observe illuminated warning lamps and text messages can lead to your vehicle breaking down In traffic, and can cause acci-dent and serious injury.
Solution
Go to a qualified workshop. Have the electrical system checked. Switch off any electrical consumers that are not required. The vehicle battery will not be charged by the alternator while the vehicle is in motion.
A WARNING (Continued)
• Never ignore any illuminated warning lamps or text messages.
• Stop the vehicle as soon as possible and when safe to do so.
CD
Failure to observe illuminated indicator lamps and text messages can lead to your vehicle be-Ing damaged. <1
Checking the electrolyte level of the vehicle battery
Fig. 279 Engine compartment: pushing up the ve-hicle battery sleeve.
r-111 First read and observe the Introductory l-Jo=,.lJ Information and safety warnings & on page 362.
The electrolyte level of the vehicle battery should be checked regularly in high-mileage vehicles, in hot countries and in older vehicle batteries. The vehicle battery is otherwise maintenance-free.
364 I Cleaning and maintenance
Vehicles with a starUstop system (=>page 283) are fitted with special vehicle batteries. The acid level of these vehicle batteries cannot be checked for technical reasons.
Preparation
• Preparing the vehicle for working in the engine compartment =>page 350.
• Open the bonnet &::. =>page 350.
Opening the battery cover
Fold the sleeve away to one side =>Fig. 279.
Checking the electrolyte level
• Ensure that enough light is available for you to see the colours clearly. Never use naked flames or glowing matter (e.g. cigarettes) as a light source.
• The colour display in the round window on the top side of the vehicle battery will change accord-ing to the electrolyte level.

Colour dis-Action play
Light yellow The electrolyte level of the vehicle
or without is too low. The vehicle battery
colour should be checked and replaced by a qualified workshop if necessary.
Black The electrolyte level of the vehicle battery is correct.
A WARNING
Any work on the vehicle battery can cause serious chemical burns, explosions and elec-trlc shocks.
• Always wear eye protection and protective gloves.
A WARNING (Continued)
• Electrolyte is very aggressive. lt can burn the skin and can cause blindness. When working with the battery, ensure that your hands, arms and face in particular are protec-ted from acid spillages.
• Never tilt the vehicle battery. Electrolyte may spill out of the battery vents and cause chemical burns.
• Never open a vehicle battery.
• if acid is spilt in your eye or on your skin, rinse immediately for several minutes with cold water. Then consult a doctor immediate-ly.
• If acid is swallowed, consult a doctor im-mediately. Charging, replacing, disconnecting and connecting the vehicle battery
r-"f'n First read and observe the introductory L-Jo:.l.l information and safety warnings & on page 362.
Charging the battery
The vehicle battery should always be charged by a qualified workshop, as the technology used in fac-tory-fitted batteries requires voltage-limited charg-ing => &. Volkswagen Commercial Vehicles recom-mends using a Volkswagen Commercial Vehicles dealership for this purpose.
If the battery cannot be charged in a qualified workshop, the charging cables of a suitable battery charger must be connected as described in =>page 443, Jump starting for vehicles with a Start/Stop system.
Replacing a vehicle battery
The battery has been developed to suit the condi-tions of its location and has special safety features. If a vehicle battery has to be replaced, discuss the electromagnetic compatibility, size and necessary servicing, output and safety requirements for the new vehicle battery with a Volkswagen Commercial Vehicles dealer before purchase. The vehicle bat-tery should be replaced by a qualified workshop. Volkswagen Commercial Vehicles recommends us-ing a Volkswagen Commercial Vehicles dealership for this purpose.
Only maintenance-free vehicle batteries compliant with the standards TL 825 06 and VVV 7 50 73 should be used. These standards must be dated July 2012 or later.
Vehicles with a Start/Stop system =>page 282 or auxiliary heater =>page 332 are fitted with a special vehicle battery. These vehicle batteries may only be replaced by a vehicle battery with the same specifications.
Disconnecting the vehicle battery
Please note the following if the vehicle battery has to be disconnected from the electrical system in the vehicle:
• Switch off all electrical consumers and the igni-tion.
• Unlock the vehicle before disconnecting the battery in order to avoid triggering the alarm.
• First disconnect the negative cable and then the positive cable => &.
Connecting the vehicle battery
• Switch off all electrical consumers and the igni-tion before reconnecting the vehicle battery.
• First reconnect the positive cable and then the negative cable=>&.
Various indicator lamps may light up after the vehi-cle battery has been connected and the ignition is switched on. They will go out if you drive a short distance at a speed of 15-20 kmlh (10-12 mph). If the indicator lamps remain lit up, the vehicle should be checked by a qualified workshop.
if the vehicle battery was disconnected for long pe-riods, the system may not able to calculate or cor-rectly display the time when the next service is due =>page 19. Comply with the maximum permissible service intervals =>Booklet Service schedule. ""
In the engine compartment 365