2012 VOLKSWAGEN BEETLE check engine light

WARNING
Working on the batteries or the electrical system in your vehicle can cause serious acid
burns, fires, explosions, or electrical shocks. Always read and heed the following WARNINGS
and safety precautions before working on the batteries or the electrical system.
x Before working on the electrical system, always switch off the ignition and all electrical
consumers and disconnect the negative (-) cable from the standard 12 Volt battery.
x When you change a light bulb, always switch off the light first.
x Always keep children away from battery acid and vehicle batteries in general.
x Always wear eye protection. Never let battery acid or lead particles come into contact with
your eyes, skin, or clothing.
x Sulfuric battery acid is very corrosive. It can burn unprotected skin and cause blindness.
Always wear protective gloves and eye protection. To reduce your risk of injury, never tilt the
batteries, as this could spill acid through the vents and burn you.
x If you get battery acid in your eyes or on your skin, immediately rinse with cold water for
several minutes and then get immediate medical attention. If you swallow any battery acid,
get medical attention immediately.
x When disconnecting the batteries from the vehicle electrical system, always disconnect
the negative cable (-) first and then the positive cable (+).
x Always switch off all electrical consumers before reconnecting 12 Volt batteries.
Reconnect the plus cable (+) first and then the negative cable (-). Never reverse the polarity of
the connections. This could cause a fire.
x A highly explosive mixture of gases is given off when the battery is being charged.
x Do not sm/+e and avoid fires, sparks, and open flames when working. Never create sparks
or electrostatic charges when handling cables and electrical equipment. Never short circuit
the battery terminals. High-energy sparks can cause serious personal injury.
x Never use or attempt to charge a damaged or frozen battery, or a battery that was frozen
but has thawed. Charging a frozen or thawed battery could cause explosions and chemical
burns! Replace damaged or frozen vehicle batteries immediately. A dead battery can freeze at
temperatures around +32 °F (0 °C).
x If the battery has a vent line or tube, make sure that it is properly connected to the battery.
WARNING
California Proposition 65 Warning
x Battery posts, terminals, and related accessories contain lead and lead components,
chemicals known to the State of California to cause cancer and reproductive harm. Wash
your hands after handling.
NOTICE
x Do not expose the vehicle battery to direct sunlight for an extended period of time as
ultraviolet rays may damage the battery housing.
x If the vehicle is left standing in the cold for a long time, protect the vehicle battery from
freezing. A battery will be permanently damaged by freezing.
Emergency starting and starting the engine with a very weak vehicle battery or after the vehicle
battery has been replaced may change or delete system settings (including time, date, personal
convenience settings, and programming). Check the settings and correct as necessary once the
vehicle battery has built up a sufficient charge.

Lights
up Possible cause Proper response
D Diesel engine pre-glow before engine
start-up. ⇒ page 113.
B
Engine control/monitoring system
malfunction (engine Malfunction Indicator
Light - MIL)
Ease off the accelerator. Carefully drive to the
nearest authorized Volkswagen dealer or
authorized Volkswagen Service Facility. Have
engine checked.

Frequently asked questions
If you suspect a malfunction or vehicle damage, read and follow the following advice before contacting
an authorized Volkswagen dealer or an authorized Volkswagen Service Facility. You may also find
helpful information under “Special considerations” or “Checklist” in the index.

Description Possible causes, among
others Possible remedy
Engine does not start.
Vehicle battery dead. – Perform jump-start..
– Charge vehicle battery..
The wrong vehicle key is used. Use a valid vehicle key.
Fuel level too low. Refuel..
Vehicle cannot be locked
or unlocked using vehicle
key.
– Battery in the remote control
vehicle key is dead.
– Too far away from the vehicle
(out of range).
– Buttons have been pressed
too many times.
– Replace the battery in the remote
control vehicle key.
– Move closer to vehicle.
– Synchronize vehicle key.
– Lock or unlock vehicle manually..
Unusual noises.
Cold engine, braking assist
systems, electronic steering
column lock.
Check the “Noises” entry in the index.
Odd driving behavior.
Assistance systems activated. Check the “Assistance systems” entry
in the index.
DSG® Direct Shift Gearbox too
hot.
Stop vehicle as soon as you can safely
do so.
Features do not work as
described in this manual.
Settings were adjusted in the
Volkswagen Information
System.
Check and reset to factory settings if
necessary.
Headlights do not light
up the road as they
should.
– Headlights incorrectly
adjusted.
– Light bulbs burned out.
– Low beams not switched on.
– Have the headlight range adjusted by
an authorized Volkswagen dealer or an
authorized Volkswagen Service Facility.
– Change light bulbs..
– Switch on low beams.
Electrical consumers do
not work.
Vehicle battery charge too low. Charge vehicle battery..
Remaining fuel level too low. Refuel..
Fuse blown. Check fuse and replace if necessary..
Fuel consumption higher
than indicated.
– Short hauls.
– “Jumpy” accelerator pedal.
– Avoid short distance driving.
– Drive defensively.
– Accelerate smoothly.
Electrical loads switched on. Switch off unnecessary loads.
Engine control malfunction. Have the malfunction corrected..
Tire pressure too low. Adjust tire pressure..
Driving in the mountains. No direct corrective action possible.
Driving with a roof rack. – Check use.
– Remove if not in use.
Driving with heavy payload. No direct corrective action possible.

Before removing the jumper cables
x Switch off the headlights (if they are on).
x In the vehicle with the dead battery, switch on the heater fan and the rear window defroster. This
helps to minimize voltage spikes when the cables are disconnected.
Removing jumper cables
With the engine running, remove the jumper cables in reverse order to the way they were connected.
1. Disconnect the black (-) cable from the vehicle with the dead battery.
2. Disconnect the black (-) cable from the other vehicle (vehicle with the good battery).
3. Disconnect the red (+) cable from the other vehicle (vehicle with the good battery).
4. Disconnect the red (+) cable from the vehicle with the dead battery.
5. Close the battery cover.
6. If necessary, unscrew the towing eye on the front of the vehicle..
WARNING
Improper use of jumper cables when jump-starting a vehicle with a dead battery can cause
the battery to explode, leading to serious personal injury. To help reduce the risk of battery
explosion:
x All work on the batteries or the electrical system in your vehicle can cause serious acid
burns, fires, or electrical shocks. Always read and heed the following WARNINGS and safety
precautions before working on the batteries or the electrical system., Vehicle battery.
x Always wear proper eye protection. Never lean over the vehicle battery.
x Attach the jumper cables in the correct order: first the positive cable, then the negative
cable.
x Never connect the negative cable from the vehicle providing starting assistance to parts
of the fuel system or to the brake hoses or brake lines.
x Never allow the non-insulated parts of the battery clamps to touch.
x Never allow the jumper cable attached to the positive battery terminal to contact metal
parts of the vehicle.
x Check the battery acid level indicator window on the vehicle battery. Use a flashlight,
never a match, cigarette lighter, or other open flame. If you cannot see the color of the
window clearly, or if it is light yellow or colorless, do not jump-start the vehicle. Get expert
assistance.
x Avoid electrostatic discharge in the vicinity of the vehicle battery. Sparks may cause the
hydrogen gas escaping from the vehicle battery to ignite.
x Never jump-start a vehicle with a battery that is damaged or frozen or that was frozen and
has thawed. The battery can explode. Replace the battery instead.
x Always follow the instructions of the jumper cable manufacturer.
x Always make sure that the battery providing starting assistance has the same voltage as
the dead battery (12 V) and about the same capacity (see battery label).
x Batteries give off explosive hydrogen gas. Always keep fire, sparks, open flame and
sm/+ing materials away from batteries.
x Never connect the negative cable from the other vehicle directly to the negative terminal
of the dead battery. The hydrogen gas from the battery is explosive.
x Never short out the battery terminals by connecting the positive (+) and negative (-)
terminals with each other.