2021 VOLKSWAGEN T-ROC check engine light

System fault
Clean the radar sensors or remove stickers or accessories from the radar sensors, mirrors and
bumper ⇒ Caring for and cleaning the vehicle exterior .
Check whether any damage is visible.
The system is not responding as expected
The radar sensors are dirty. The sensor visibility may be impaired by dirt and snow or also residue
from cleaning agents or coatings ⇒ Caring for and cleaning the vehicle exterior .
The prerequisites for system operation must be met ⇒ System limits .
The radar sensors are covered by water.
The vehicle is damaged in the area of the radar sensors, e.g. caused by parking collisions.
The detection ranges of the radar sensors are blocked by add-on parts, e.g. bicycle carriers.
Changes have been made to the paintwork in the area of the radar sensors or structural
modifications have been made, e.g. on the vehicle front end or the running gear.
Only Volkswagen-approved vehicle paints may be used on the rear bumper. Other vehicle paints can
restrict the function of the system or cause faults.
Tinting foils have been retrofitted on the side windows.
Parking and manoeuvring
Parking
Stopping and parking the vehicle
The actions should be carried out only in the given order:
Stop the vehicle on a suitable surface ⇒ .
Depress and hold the brake pedal until the engine has stopped.
Switch on the electronic parking brake ⇒ Electronic parking brake . The electronic parking brake is
switched on when the indicator lamp in the button ⇒ Fig. 125  lights up yellow and the indicator
lamp in the instrument cluster display lights up red.
On vehicles with a manual gearbox, either fully depress or disengage the clutch.
With an automatic gearbox, move the selector lever to position P.
Switch off the engine and take your foot off the brake pedal.
Turn the steering wheel slightly if necessary to engage the steering lock mechanism.
With a manual gearbox, select first gear for flat ground and uphill gradients, or reverse gear for
downhill gradients, and then release the clutch.
Please ensure that all occupants, in particular children, leave the vehicle.

pecified on the pump meets the vehicle's
requirements.
-approved service additives in the approved quantity.
emergency, you have to use petrol with an octane number lower than the recommended number,
drive at medium engine speeds and avoid high engine loading. Avoid high engine speeds and heavy
engine loads. Refuel with petrol with the correct octane number as soon as possible.
Diesel
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Fill vehicles with a diesel engine only with diesel or diesel with a maximum RME fuel content of 7 %
⇒ .
If you use diesel with a high sulphur content, the service intervals are shorter. Information on
countries where the diesel has a high sulphur content is available from your Volkswagen dealership
or a qualified workshop.
The fuel quality affects the running properties, performance and service life of the engine. Refuel
with fuel that already contains suitable service additives ⇒ .
Information on the fuel standards can be found in the chapter on fuel standards ⇒ Fuel standards .
Winter-grade diesel fuel and filter preheater system
Winter-grade diesel fuel, which can be used at temperatures below -20°C (-4°F), is available during
the cold months. In countries with different climates, diesel with a different temperature behaviour
is offered. Information is available from your Volkswagen dealership, qualified workshops and filling
stations in the respective country.
Diesel vehicles are equipped with a filter preheater system. When using winter-grade diesel fuel, the
fuel system is safe for operation at temperatures down to around -24°C (-11°F). In order to ensure
that the vehicle can also be started at low outside temperatures, Volkswagen recommends parking
the vehicle in a location that is protected from the whether, e.g. in a garage ⇒ Troubleshooting .
Misfuelling prevention device
The tank filler neck in diesel vehicles may be fitted with a misfuelling prevention device. This is
intended to help ensure that the vehicle is refuelled only using diesel filler nozzles.
If the nozzle cannot be inserted correctly into the tank filler neck, first check whether you are using a
diesel filler nozzle. When you have made sure that you are using the correct filler nozzle, move the
diesel filler nozzle to and fro slightly with light pressure. This can open the misfuelling prevention
device and make it possible to refuel the vehicle. If the misfuelling prevention device still remains
closed, go to a qualified workshop and have the system checked.
If it is necessary to refuel the vehicle using a fuel canister in the event of an emergency, the
misfuelling prevention device will not open. In order to nevertheless fill the tank with fuel, pour the
diesel into the tank extremely slowly in very small quantities.

First read and observe the introductoryinformation and safety warnings⇒Introduction 
⇒ Petrol .
⇒ Refuelling .
⇒ Checking the engine oil level and refilling the engine oil .
⇒ Jump starting the vehicle .
If you notice misfiring, loss of power or uneven running when driving, reduce speed immediately and
have the vehicle checked by a qualified workshop ⇒ Troubleshooting . Otherwise unburnt fuel can
enter the exhaust system and escape into the atmosphere. The catalytic converter can also be
damaged by overheating.

The emissions may have a sulphur-like smell even when the exhaust purification system is working
properly.
Particulate filter
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Function
⇒ Fuel standards .
⇒ Refuelling .
⇒ Engine oil standards .
⇒ Jump starting the vehicle .
Periodic regeneration
The soot in the particulate filter is burnt off at high temperatures on a periodic basis.
To assist the regeneration of the particulate filter, Volkswagen recommends that you avoid making
only short journeys.
Noises, slight smells and increased engine speeds may occur during regeneration. The radiator fan
may run on while the vehicle is moving or when the engine has been switched off.

During the periodic regeneration process, the yellow indicator lamp does not light up.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Irregular engine running and faults

Additional bulb specifications
Some bulbs in headlights or in tail light clusters might have factory specifications that are different to
standard bulbs. The designation is inscribed on the bulb, either on the glass part or on the base.

WARNING
Accidents can occur if roads are not sufficiently illuminated and other road users have difficulty
seeing the vehicle, or cannot see it at all.

WARNING
Changing bulbs incorrectly can cause accidents and serious injuries.
⇒ In the
engine compartment . The engine compartment of any motor vehicle is a dangerous area. Serious
injuries can be sustained here.


change a bulb unless you are familiar with the procedure. If you are uncertain of what to
do, the work should be carried out by a qualified workshop.
heat will cause fingerprints to evaporate on the bulb, which in turn will cause the reflector to go
blind.
-edged parts in the headlight housing in the engine compartment and on the tail
light cluster housing. Protect your hands when changing bulbs.

NOTICE
Damage to the electrical system can be caused by water entering the system if the rubber cover or
plastic covers on the headlight housing are not properly mounted after a bulb has been changed.
Checklist Information on changing bulbs

First read and observe the introductoryinformation and safety warnings⇒Introduction 
Checklist
Always carry out the following actions for changing a bulb in the given order ⇒ :

Park the vehicle on a firm and level surface at a safe distance from the flow of traffic.

Switch on the electronic parking brake Electronic parking brake.

Turn the light switch to position 0 Switching lights on and off.

Move the turn signal and main beam lever to neutral position Switching turn signals on and off.

Automatic gearbox: move the selector lever to position P DSG® dual clutch gearbox.

Stop the engine and remove the vehicle key from the ignition Starting the engine.

Manual gearbox: select a gear Manual gearbox: selecting a gear.

Allow the orientation lighting to go out Coming Home and Leaving Home function (orientation
lighting).

Leave the defective bulbs to cool down.

Check to see if a fuse has visibly blown Changing fuses.

Follow the instructions to change the affected bulb . Always replace bulbs with identical bulbs of the
same type. The designation is inscribed on the bulb, either on the glass part or on the base.

Do not touch the glass part of the bulb with unprotected fingers. When switched on, the heat of the
bulb would cause the remaining fingerprint to evaporate and be deposited on the reflector. This will
impair the light output of the headlight.

After changing a bulb, check to ensure that the bulb is working properly. If the bulb is not working
properly, the bulb may not have been inserted properly, may have failed again, or the connector
may have been fitted incorrectly.

Any time you change a bulb at the front of the vehicle, the headlight settings should be checked by a
qualified workshop.

WARNING
Ignoring any of the items on this important safety checklist can lead to accidents and severe injuries.


NOTICE
Always take care when removing or fitting lights to prevent damage to the paintwork or to other
vehicle parts.
Changing bulbs in the front headlights (halogen bulbs)

Fig. 166 In engine compartment: covers on the left-hand headlight: ① dipped beam, ② main
beam.

Fig. 167 In the engine compartment: changing bulbs in the left front headlight.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
The front headlight does not need to be removed when changing bulbs.
The actions should always be carried out in the specified order:
⇒ Fig. 166  and ⇒ Fig. 167 
Observe and follow the instructions on the checklist ⇒ Checklist Information on changing
bulbs 
Open the bonnet ⇒ In the engine compartment .

Pull off the rubber cover on the rear side of the headlight. Depending on the version, a hard plastic
cover may be fitted here. Turn the cover anti-clockwise and remove it.

Dipped beam ① Turn the bulb holder anticlockwise as far as it will go and carefully pull it out to the
rear along with the bulb.
Main beam ② Press on the bulb from below, as shown by the arrow, until it engages. Lift the bulb
back and out.

Replace the defective bulb with a new bulb of the same type.

Dipped beam ① Insert the bulb holder into the headlight and turn it clockwise as far as it will go.
Main beam ② Insert the bulb into the opening in the headlight with the connector at the top and
push down. The lug of the bulb must be located in the headlight recess (small arrow).

Attach the rubber cover or hard plastic cover and turn it clockwise as far as it will go.
Close the bonnet ⇒ In the engine compartment .
Changing the bulbs in the headlights (lights with LED technology)
First read and observe the introductoryinformation and safety warnings⇒Introduction 
These lamps use LED technology. The LEDs cannot be replaced by customers. If some LEDs fail, this
may be an indication that more elements are on the point of failure. In this case, have the lights
checked and renewed if necessary at a qualified workshop.
Changing the front turn signal bulbs

Fig. 168 In the front right wheel housing liner: changing a turn signal bulb.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
The actions should only be carried out in the specified order:
Observe and follow the instructions in the checklist ⇒ Checklist Information on changing
bulbs .
Turn the steering so that the wheel on the affected side of the vehicle is pointing to the
middle of the vehicle. If necessary, start the engine to do this. Then stop the engine again and
remove the vehicle key from the ignition lock.
Turn the cover in the wheel housing liner in the direction of the arrow and remove it
⇒ Fig. 168 .
Release the connector ⇒ Fig. 168  ① and detach it.
Turn the bulb holder ⇒ Fig. 168  ② anti-clockwise (arrow) as far as it will go and pull it out to
the rear along with the bulb.
Replace the defective bulb with a new bulb of the same type.
Insert the bulb holder into the headlight and turn it clockwise as far as it will go.