2011 Seat Leon 5D warning light

82Cockpit
Coolant level* / temperature  (red)
The warning lamp lights up if the coolant temperature is too
high or if the coolant level is too low.
There is a fault if:
● The warning symbol does not go out again after a few seconds.
● The warning lamp lights up or flashes while the vehicle is moving, and
three acoustic warning signals ⇒ 
are emitted.
This means that either the coolant level is too low or the coolant tempera-
ture is too high.
Coolant temperature too high
The instrument panel displays the following message 1)
: CHECK COOLANT IN-
STRUCTION MANUAL ⇒  page 224.
First look at the coolant temperature gauge. The coolant temperature is too
high if the needle is over the warning area on the dial. Stop the vehicle,
switch the engine off and wait for it to cool down. Check the coolant level.
If the coolant level is correct, the overheating may be caused by a malfunc-
tion of the radiator fan. Check the radiator fan fuse and have it replaced if
necessary ⇒ page 250.
If the warning lamp lights up again after driving on for a short distance,
stop the vehicle and switch the engine off . Contact an Authorised Service
Centre or a specialised workshop.
Coolant level too low
The instrument panel displays the following message 1)
: STOP CHECK COOL-
ANT INSTRUCTION MANUAL.
First look at the coolant temperature gauge. If the needle is in the normal
range, top up with coolant at the earliest opportunity ⇒ 
.
WARNING
● If your vehicle is immobilised for technical reasons, move it to a safe
distance from traffic. Turn the engine off, turn the hazard lights on and
place the warning triangle.
● Never open the bonnet if you can see or hear steam or coolant escap-
ing from the engine compartment. Risk of scalding. Wait until you can no
longer see or hear escaping steam or coolant.
● The engine compartment is a dangerous area! Before carrying out any
work in the engine compartment, switch off the engine and allow it to
cool down. Always note the corresponding warnings ⇒ page 217.

Coolant temperature  (blue)
This lamp lights up when the coolant is below approximately 45°C. When it
exceeds this temperature the lamp turns off. 
Rear fog light 
This warning lamp lights up when the rear fog light is switched on . For
further information see ⇒ page 115. 
1)
Depending on the version of the model.

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Cockpit
Turn signals  
The indicator lamp flashes when the turn signals are in op-
eration.
Depending on which turn signal is operating, either the left  or right 
turn signal lamp flashes. Both indicator lamps will flash at the same time
when the hazard warning lights are switched on.
If any of both turn signals fails, the indicator lamp will start flashing twice
faster than normal.
For further information on the turn signals, please see ⇒ page 122. 
Engine management* 
This warning lamp monitors the engine management sys-
tem for petrol engines.
The warning lamp  (Electronic Power Control) lights up when the ignition
is switched on to show that the lamp is working properly. It should go out
once the engine is started.
If there is a fault in the electronic engine management system while you are
driving, this warning lamp will light up. Stop the vehicle and seek technical
assistance. Glow plug system / engine fault

The warning lamp lights up to show that the glow plugs are
preheating. It flashes if there is an engine fault.
Warning lamp  is lit
The warning lamp  lights up while the glow plugs are preheating. When
the warning lamp goes off, the engine should be started straight away.
Warning lamp  flashes
If a fault develops in the engine management system while you are driving,
the glow plug lamp will flash . Take the vehicle to an Authorised Service
Centre as soon as possible and have the engine checked. 
Main beam headlights 
This warning lamp lights up when the main beams are on.
The warning lamp  is switched on once main beams are on or once the
headlight flasher is operating.
For further information see ⇒ page 122. 
Soot accumulation in the diesel engine particulate filter *

If the warning lamp  lights up you should help the filter clean itself by
driving in the appropriate manner. 
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84Cockpit
To do this, drive about 15 minutes in fourth or fifth gear (automatic gear-
box: S gear range) at a speed of 60 km/h, with the engine running at ap-
proximately 2000 rpm. In this way, the pollen build up in the filter is burned.
When cleaning is successful, the indicator turns off.
If the warning lamp  does not turn off, or the three lamps turn on (partic-
ulate filter , emission control system fault  and glow plugs ), take
the vehicle to a specialised workshop to repair the fault.
WARNING
● Always drive according to the road weather conditions, the terrain
and traffic. Driving recommendations should never lead to illegal ma-
noeuvres in surrounding traffic.
● The diesel engine particulate filter may reach extremely high temper-
atures; it should not enter into contact with flammable materials under-
neath the vehicle. Otherwise there is a risk of fire.

Anti-lock brake system (ABS)* 
A warning lamp monitors the ABS.
The indicator lamp  should light up for a few seconds when the ignition is
switched on. It goes out again after the system has run through an automat-
ic test sequence.
There is a fault in the ABS if:
● The warning lamp  does not light up when the ignition is switched on.
● The warning lamp does not go out again after a few seconds
● The warning lamp lights up when the vehicle is moving
The vehicle can still be braked in the normal way, without the ABS function.
Take the vehicle to a specialised workshop as soon as possible. For further
information on the ABS go to ⇒ page 182. If a fault occurs in the ABS, the ESC (ESP)* warning lamp will also light up.
Brake system fault
If the ABS warning lamp
 lights up together with the brake warning lamp
, this indicates not only a fault in the ABS function, but also a possible
fault in the brake system ⇒ 
.
WARNING
● Before opening the bonnet, read and observe the warnings on
⇒ page 217, Working in the engine compartment.
● If the brake warning lamp  should light up together with the ABS
warning lamp , stop the vehicle immediately and check the brake fluid
level in the reservoir ⇒ page 229, Brake fluid. If the fluid level has drop-
ped below the “MIN” mark you must not drive on. Risk of accident. Ob-
tain technical assistance.
● If the brake fluid level is correct, the fault in the brake system may
have been caused by a failure of the ABS system. This could cause the
rear wheels to lock quickly when you brake. This could cause the rear to
break away. Risk of skidding. Stop the vehicle and seek technical assis-
tance.

Washer fluid 
This warning lamp lights up to indicate that the windscreen
washer level is too low. This serves as a reminder to fill up the reservoir at the earliest opportunity
⇒ page 226 

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Cockpit
The following message is shown on the instrument panel display* 1)
: REFILL
WINDSCREEN WASHER FLUID . 
Alternator 
This warning lamp signals a fault in the alternator.
The warning lamp  lights up when the ignition is switched on. It should
go out when the engine has started running.
If the warning lamp  lights up while driving, the alternator is no longer
charging the battery. You should immediately drive to the nearest special-
ised workshop.
You should avoid using electrical equipment that is not absolutely necessa-
ry because this will drain the battery. 
Worn brake pads 
If the  symbol lights up, have the front brake pads (and, for safety rea-
sons, the rear pads as well) inspected by a specialised workshop. Tyre pressure 
The tyre pressure control system controls the tyre speed and
the frequency spectrum of each tyre.
Fig. 50 Centre console:
tyre monitor system but-
ton
The tyre warning lamp 2)
compares wheel revolutions and with this informa-
tion, the diameter of each wheel using the ESC (ESP) sensors. If the diame-
ter of a wheel changes, the tyre warning lamp  lights up. The wheel diam-
eter changes when:
● Tyre pressure is insufficient.
● The tyre structure is damaged.
● The vehicle is unbalanced because of a load.
● The wheels of one axle are under more pressure (for example, driving
with a trailer or on extreme slopes).
● The vehicle is fitted with snow chains. 
1)
Depending on the version of the model.
2) Depending on the model version
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● The temporary spare wheel is fitted.
● The wheel on one axle is changed.
Tyre pressure adjustment
Following the modification to tyre pressure or after changing one or more
wheels, the button ⇒  fig. 50 must be kept pressed while the ignition is on
until an acoustic signal is heard and the warning lamp goes out.
If the wheels are under excessive load (for example, driving with a trailer or
heavy load), the tyre pressure must be increased to the recommended value
for a full load (see the sticker on the inside of the fuel flap). If the tyre moni-
tor system button is pressed down, the new tyre pressures are confirmed.
The tyre pressure warning lamp  lights up
If the tyre pressure of one or more wheels is much lower than the value set
by the driver, the tyre control warning lamp lights up ⇒ 
.
The tyre pressure warning lamp  flashes
If the tyre pressure warning lamp flashes, this indicates a fault. Go to the
nearest specialist workshop.
WARNING
● When the tyre pressure warning lamp lights up, reduce speed imme-
diately and avoid any sudden manoeuvre or braking. Stop when possible,
and check the tyre pressure and status.
● The driver is responsible for maintaining correct tyre pressures. For
this reason, tyre pressure must be regularly checked.
● Under certain circumstances (for example, when driving in a sports-
like manner, in winter conditions or on a dirt track) the tyre warning lamp
may light up or function incorrectly.
Note
If the battery is disconnected, the yellow warning lamp  lights up after
turning the ignition on. This should turn off after a brief journey. 
Brake system* 
This warning lamp lights up if the brake fluid level is too low
or if there is a fault in the system.
This warning lamp  lights up if
● the brake fluid level is too low ⇒ page 229.
The instrument panel displays the following message 1)
: STOP BRAKE FLUID
INSTRUCTION MANUAL.
● there is a fault in the brake system.
The instrument panel displays the following message 1)
: BRAKE SYSTEM
FAULT INSTRUCTION MANUAL.
This warning lamp can light up together with the ABS system warning lamp. 
1)
Depending on the version of the model.

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Cockpit
WARNING
● Before opening the bonnet, read and observe the warnings on
⇒ page 217.
● If the brake warning lamp does not go out, or if it lights up when driv-
ing, the brake fluid level ⇒ page 229, Brake fluid in the reservoir is too
low. Risk of accident. Stop the vehicle and do not drive on. Obtain techni-
cal assistance.
● If the brake warning lamp  lights up together with the ABS warning
lamp , the control function of the ABS could be out of action. This could
cause the rear wheels to lock quickly when you brake. This could cause
the rear to break away. Risk of skidding. Stop the vehicle and seek tech-
nical assistance.

Handbrake 
This lamp lights up when the handbrake is applied. If you drive faster than 6 km/h with the handbrake on, the following mes-
sage will appear on the instrument panel display 1)
: HANDBRAKE ON. You will
also hear an acoustic warning signal ⇒ page 173. 
Bulb defect 
The warning lamp lights up when a bulb in the vehicle's ex-
terior lighting is defective.
The warning lamp  lights up when a bulb in the vehicle's exterior lighting
(e.g. left-hand main beam) is defective. The instrument panel displays the following message
1)
: LEFT FULL BEAM
FAULTY. 
Engine oil pressure 
If this warning lamp is red it indicates that the engine oil
pressure is too low.
If this warning symbol starts to flash, and is accompanied by three audible
warnings, switch off the engine and check the oil level. If necessary, add
more oil ⇒ page 220.
The instrument panel displays the following message 1)
: STOP ENGINE OIL
PRESSURE INSTRUCTION MANUAL .
If the symbol flashes although the oil level is correct, do not drive on. The
engine must not even run at idle speed. Obtain technical assistance.
Checking the oil level 
If the warning lamp is yellow  the engine oil level should be checked as
soon as possible. Top up the oil ⇒ page 222 at the next opportunity.
Oil level sensor faulty* 
If the  yellow warning lamp flashes, take the vehicle to a specialised
workshop to have the oil level sensor checked. Until then it is advisable to
check the oil level every time you refuel. 
1)
Depending on the version of the model.
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Cruise speed (Cruise control)* 
The warning lamp comes on when the cruise control system
is switched on.
The warning lamp  lights up when the cruise control system is switched
on. For further information on the cruise control system, see ⇒ page 178.
Indicator for open doors or tailgate* 
This warning lamp lights up if one of the doors or the tail-
gate is open. The warning light  should go off when all the doors are closed correctly.
The system also works when the ignition is switched off. It should go off ap-
prox. 15 seconds after the vehicle is locked. 
Electromechanical steering* 
For vehicles with power steering, the level of steering assistance depends
on the vehicle's speed and on the steering angle.
The warning lamp should light up for a few seconds when the ignition is
switched on. It should go out once the engine is started.
If the battery is disconnected, the indicator remains lit, even with the en-
gine running. The warning light only goes off after a distance of approx. 50
m. There is a fault in the electromechanical steering system if the lamp does
not go out or lights up whilst the vehicle is in motion. The warning lamp
may appear in two different colours to indicate faults. If it lights yellow, this
indicates a minor fault. If it lights red, seek workshop assistance immedi-
ately, as the steering assistance is not working; in this case you should not
keep driving. Stop the vehicle and seek technical assistance. The power
steering does not work if the battery is flat or if the engine is off (for exam-
ple, for towing). You should take into account that you will need considera-
bly more power than normal to steer the vehicle if the power steering is not
working correctly or at all.
For those vehicles fitted with ESC (ESP)* the function “Recommended steer-
ing manoeuvre” is included. See
⇒ page 184. 
Emission control system* 
This warning lamp monitors the exhaust system.
Warning lamp  flashes:
When there is misfiring that can damage the catalytic converter. Reduce
speed and drive carefully to the nearest specialised workshop to have the
engine checked.
The instrument panel displays the following message 1)
: EXHAUST GAS SEE
WORKSHOP.
Warning lamp  is lit:
If a fault has developed during driving which has reduced the quality of the
exhaust gas (e.g. lambda probe fault). Reduce speed and drive carefully to
the nearest specialised workshop to have the engine checked.
The following message is shown in the instrument panel display: EXHAUST
GAS SEE WORKSHOP . 
1)
Depending on the version of the model.

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Electronic Stability Control ESC (ESP) *  / 
There are two control lamps for the electronic stability con-
trol. The  lamp provides information concerning the func-
tion and the  provides information on the disconnection
status
Both lamps come on together when the ignition is switched on and should
go out after approx. 2 seconds, which is how long the function check lasts.
This programme includes the ABS, EDL and ASR (TCS). This also includes
the brake assist system (BAS), automatic cleaning of the brake discs and
the trailer stability programme (TSP).
The warning lamp  has the following functions: ● It flashes when the ASR (TCS)/ESC (ESP) is activated when driving.
● It will light up continuously if there is a malfunction in the ESC (ESP).
● The ESC (ESP) lamp will also come on if a fault should occur in the ABS
because the ESC (ESP) operates in conjunction with the ABS.
If the ESP warning lamp  lights up and stays on after the engine is started,
this may mean that the control system has temporarily switched off the ESP.
In this case the ESC (ESP) can be reactivated by switching the ignition off
and then on again. If the warning lamp goes out, this means the system is
fully functional.
The  lamp provides information about the disconnection status of the
system:
● It stays lit when the ASR (TCS) is disconnected after pressing the 
switch. Differential lock fault (EDL)*EDL operates along with the ABS in vehicles equipped with
the Electronic Stability Control ESC (ESP)*
A malfunction in the EDL is indicated by the ABS warning lamp . Take the
vehicle to a specialised workshop as soon as possible. For further informa-
tion on the EDL see ⇒ page 185, Electronic differential lock (EDL)*. 
Traction control system ASR (TCS)*  / 
The traction control system prevents the driven wheels from
spinning when the vehicle is accelerating
There are two warning lamps for the traction control system:  and . Both
lamps come on together when the ignition is switched on and should go out
after approx. 2 seconds, which is how long the function check lasts.
The  lamp has the following function:
● It flashes when the ASR (TCS) is activated while driving.
If the system is deactivated or if it has any fault, the warning lamp will re-
main lit. The ASR (TCS) lamp will also come on if a fault should occur in the
ABS because the ASR (TCS) operates in conjunction with the ABS. For fur-
ther information, see ⇒  page 182, Brakes
The  lamp provides information about the disconnection status of the
system:
● It stays lit when the ASR (TCS) is disconnected after pressing the OFF
switch.
By pressing again, the ASR (TCS) function is reactivated and the warning
lamp switched off. 
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