Volvo 2003 V40 Operation And Care Manual page 18

If the light comes on while driving or braking, stop immediately, open the hood and check the brake fluid level
in the reservoir. See page 116
If the control lamp still stays on, the EBD (Electronic Brakeforce Distribution) is not working.
Drive to your Volvo retailer. See ABS control lamp and also
Canadian models are equipped with this warning light:
Bulb failure warning light
The light will come on if one of the brake light bulbs are defective when the brake pedal is pressed.
Check the fuse and bulb. See sections "Replacing bulbs" and "fuses".
pg. 23 Warning lights, Daytime Running Lights
DSA (option)
Dynamic Stability Assistance
This is a system which helps keep the drive wheels from spinning. The light flashes if the road surface is slippery, the
wheels are spinning and the system is working.
The control light comes on if a fault occurs in the DSA system. It also comes on if the system is switched off via the
switch.
For more information see
Service Reminder Light
This light will come on according to preset service intervals or after 750 hours of driving or after 12 months,
whichever occurs first. It is a reminder to the driver that the service interval has been exceeded. The light will stay on
for 2 minutes after start until reset by the servicing retailer.
Anti-lock Brake system (ABS)
If the warning lamp lights up there is a malfunction of the ABS system (the standard braking system will however
function). The vehicle should be driven to a Volvo retailer for inspection.
See page 73 for additional information.
Malfunction Indicator Lamp
On-Board Diagnostics II (OBDII): As you drive, a computer called "OBDII" monitors your car's engine,
transmission, electrical and emission systems. The CHECK ENGINE light will light up if the computer senses a
condition that potentially may need correcting. When this happens, please have your car checked by a Volvo retailer as
soon as possible.
A CHECK ENGINE light may have many causes. Sometimes, you may not notice a change in your car's behavior.
Even so, an uncorrected condition could hurt fuel economy, emission cleanliness, and driveability. Extended driving
without correcting the cause could even damage other components in your car.
Canadian models are equipped with this warning light:
NOTE: If the fuel filler cap is not closed tightly or if the engine is running when the car is refueled, the Check Engine
Lamp may indicate a fault. However, your vehicle's performance will not be affected. Use only Volvo original or
approved fuel filler caps.
Daytime Running Lights:
for reservoir position.
page 30.
page 73.