The Volvo V40 truck instrument panel provides essential alerts for safe operation. Red warnings require immediate stop, amber indicates service needed, and blue/green shows active features. Familiarize yourself with these symbols to maintain your vehicle's reliability.
Volvo Trucks V40 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical fault detected in the Volvo V40; stop safely as soon as possible to prevent engine or drivetrain damage. | Stop the vehicle immediately, engage parking brake, and contact Volvo service. | |
| Check Engine (MIL) | AMBER | The engine management system on your Volvo V40 has logged a fault, possibly emissions-related or performance-impacting. | Reduce speed, schedule diagnostics at a Volvo workshop soon. | |
| Engine Oil Pressure | RED | Low oil pressure in the Volvo V40 engine; could indicate low oil level, pump failure, or blockage. | Stop engine immediately and check oil level. If ok, do not restart; call for tow. | |
| Battery / Charging | RED | The charging system on your Volvo V40 is not maintaining battery voltage, often due to alternator or belt issues. | Turn off non-essential loads, drive to nearest service center if possible. | |
| Coolant Temperature | RED | Engine coolant temperature in the Volvo V40 has exceeded safe limits, risking overheating damage. | Stop engine, allow to cool, check coolant level and fan operation. | |
| Brake System | RED | A brake system fault on the Volvo V40, possibly low brake fluid, worn pads, or hydraulic failure. | Do not drive; check brake fluid reservoir and contact Volvo roadside assistance. | |
| ABS | AMBER | The anti-lock brake system on your Volvo V40 has a fault; standard brakes still work but ABS may not engage. | Drive cautiously to a workshop; avoid hard braking on slick surfaces. | |
| Parking Brake | RED | Parking brake is engaged or a fault exists in the Volvo V40 parking brake system. | Release parking brake; if light stays, have system inspected. | |
| Tire Pressure (TPMS) | AMBER | One or more tires on the Volvo V40 have low pressure; check and inflate to recommended values. | Check all tire pressures when safe, inflate as needed. | |
| Airbag (SRS) | AMBER | The supplemental restraint system on your Volvo V40 has a fault; airbags may not deploy in a collision. | Visit a Volvo dealership to diagnose and repair the SRS system. | |
| Seat Belt | RED | The seatbelt reminder for the driver or passenger seat in the Volvo V40 is active. | Fasten your seatbelt immediately. | |
| Glow Plug / Preheat | AMBER | Preheat cycle active or glow plug fault in the Volvo V40; wait for light to turn off before starting in cold weather. | Wait until light extinguishes then crank engine. | |
| DPF / Regeneration | AMBER | The diesel particulate filter on your Volvo V40 needs regeneration to clear soot buildup. | Drive at highway speeds or initiate stationary regeneration per manual. | |
| DEF / AdBlue | AMBER | AdBlue level low or fluid quality issue on the Volvo V40; engine performance may be reduced. | Refill AdBlue tank with approved fluid promptly. | |
| Water in Fuel | AMBER | Water detected in the fuel system of your Volvo V40; drain the water separator to prevent injector damage. | Drain water separator and replace fuel filter if necessary. | |
| High Beam | BLUE | High beam headlights are switched on in the Volvo V40. | Dim to low beam when approaching traffic. |
16 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheating
Common causes
- Coolant leak from radiator or hoses
- Failed thermostat or water pump
- Clogged radiator or low coolant level
What to do
Stop the Volvo V40 immediately, allow engine to cool, check coolant reservoir and radiator for leaks. If top up and still overheats, call for a tow to a Volvo service center.
Low Oil Pressure
Common causes
- Low engine oil level due to leaks or consumption
- Faulty oil pump or blocked filter
- Worn engine bearings
What to do
Turn off the Volvo V40 engine at once and check oil dipstick. Add oil if needed; if light remains on, do not restart—tow to a Volvo workshop.
Brake System Failure
Common causes
- Brake fluid leak from lines or calipers
- Worn brake pads beyond sensor limit
- Failed master cylinder or ABS module
What to do
Do not drive the Volvo V40. Check brake fluid level; if low, add fluid and inspect for leaks. If pedal feels soft or light remains, request roadside assistance.
Battery/Charging Issue
Common causes
- Loose or corroded battery terminals
- Failed alternator or drive belt
- Parasitic drain from electrical component
What to do
Check battery connections and ensure they are tight. If the Volvo V40 can run, head to a service center; if not, jump-start may help temporarily, but alternator likely needs replacement.
AdBlue System Problem
Common causes
- AdBlue tank empty using incorrect fluid
- Faulty or clogged injector
- DEF quality sensor or heater failure
What to do
Refill with genuine Volvo AdBlue; if light remains, the Volvo V40 may enter reduced power mode. Visit a Volvo dealer to reset and repair the system.
Frequently Asked Questions
What should I do if the red engine oil pressure light comes on in my Volvo V40?
Stop the engine immediately—low oil pressure can cause severe damage. Check the oil level before restarting; if level is ok, do not restart and contact Volvo roadside assistance.
How do I perform a parked regeneration on the Volvo V40 DPF?
Park safely, engage parking brake, ensure engine is warm, then press and hold the regeneration button on the dashboard until the DPF light blinks. Follow the prompts; the process takes about 20 minutes.
My Volvo V40 AdBlue warning came on; can I still drive?
You can drive a limited distance (usually about 1000 km) before engine power is reduced. Refill with approved AdBlue as soon as possible to restore full performance.
What does the amber check engine light indicate on the V40?
It indicates a fault in the engine or emissions system that doesn't require immediate stopping. Schedule a diagnostic at a Volvo workshop; continued driving may affect fuel economy.
Why is my Volvo V40 brake system light red after releasing the parking brake?
This signals a fault in the base brake system, such as low brake fluid, worn pads, or a hydraulic issue. Do not drive; check fluid level and contact Volvo service.
How often should I check tire pressure on the Volvo V40?
Visually inspect monthly and before long trips. Use the TPMS display to monitor; recommended pressure for steer tires is 115 psi and drive tires 105 psi (see your vehicle label).