The Volvo Trucks VT instrument cluster provides critical warnings and indicators tailored for heavy-duty semi-truck operations. With a focus on reliability and safety, these lights alert drivers to engine, brake, and aftertreatment system statuses specific to Volvo's advanced powertrain.
Volvo Trucks VT Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system failure has occurred, requiring immediate shutdown in the Volvo VT to prevent engine or transmission damage. | Safely pull over as soon as possible and consult the error code via the dashboard display. | |
| Master Caution | AMBER | A non-critical but important system alert is active, such as low AdBlue or pending regeneration on your Volvo VT. | Check the central display for detailed messages and schedule service if needed. | |
| Check Engine (MIL) | AMBER | The engine control module has detected a fault in the Volvo VT's emissions or performance systems, possibly affecting DPF or SCR. | Reduce load and continue to a service center; do not ignore as it may lead to derating. | |
| Engine Oil Pressure | RED | Engine oil pressure has dropped below safe levels, risking severe damage to the Volvo VT's D13 or D16 engine. | Stop engine immediately and check oil level – do not restart if low. | |
| Battery / Charging | RED | The charging system is failing, meaning the Volvo VT's alternator is not supplying enough current to the batteries. | Minimize electrical loads and head to a repair shop; continued operation may stall the truck. | |
| Coolant Temperature | RED | Coolant temperature is critically high, risking engine overheating and damage in the Volvo VT's cooling system. | Stop immediately and allow engine to cool; check coolant level and fan operation. | |
| Transmission Temp | AMBER | The transmission fluid temperature is high, which could degrade the I-Shift gearbox performance in your Volvo VT. | Reduce speed and shift to a lower gear if possible; stop if light stays on. | |
| Brake System | RED | A hydraulic or air brake fault has been detected, affecting stopping ability on the Volvo VT's full air brake system. | Do not drive – call for roadside assistance immediately. | |
| ABS | AMBER | The anti-lock braking system is malfunctioning; traction control may also be impacted on your Volvo VT. | Brake normally but avoid sudden stops; have the system inspected soon. | |
| Parking Brake | RED | The parking brake is engaged or a fault exists in the spring brake system on the Volvo VT. | Ensure parking brake is fully released before driving; if light persists, service is needed. | |
| Tire Pressure (TPMS) | AMBER | One or more tires on the Volvo VT have low air pressure, increasing fuel consumption and blowout risk. | Check and inflate tires to recommended pressures at the next stop. | |
| Seat Belt | RED | The driver's seat belt is not fastened; the Volvo VT's safety system requires belt use to avoid alarms. | Fasten seat belt immediately. | |
| Glow Plug / Preheat | AMBER | The glow plug or intake heater is active or faulty; the Volvo VT may have difficulty starting in cold conditions. | Wait for light to turn off before cranking the engine. | |
| DPF / Regeneration | AMBER | The diesel particulate filter is clogged and requires active regeneration; the Volvo VT's aftertreatment system will initiate cleaning. | Drive at highway speed until regeneration completes; do not idle if possible. | |
| DEF / AdBlue | AMBER | AdBlue level is low or system fault; the Volvo VT will eventually derate if not refilled. | Refill AdBlue tank with approved fluid immediately to avoid reduced power. | |
| Water in Fuel | AMBER | Water has accumulated in the fuel filter/water separator of the Volvo VT, risking injection system damage. | Drain water separator as per owner's manual; replace filter if necessary. | |
| Low Fuel | AMBER | Fuel level is low; the Volvo VT's tanks require refueling soon to avoid running dry. | Refuel at the next opportunity. | |
| High Beam | BLUE | High beam headlights are active on the Volvo VT, providing maximum road illumination. | Dim when approaching oncoming traffic. | |
| Reduced Power (Limp Mode) | AMBER | Engine power is limited to protect components; common in Volvo VT due to DPF or SCR issues. | Reduce speed and drive to a service center; check fault codes. | |
| Air Brake Pressure (Low) | RED | Air brake system pressure is below safe operating level on the Volvo VT, compromising braking force. | Do not drive; allow compressor to build pressure or call for service. | |
| Engine / Exhaust Brake | GREEN | The Volvo VT's engine brake or retarder is engaged, aiding downhill speed control. | Use as needed; deactivate on slippery roads. | |
| Trailer | GREEN | A trailer is properly connected and detected by the Volvo VT's electrical system. | Verify trailer lighting and brakes before departure. | |
| Door Open | RED | A cab door or compartment is not fully closed on the Volvo VT. | Close all doors securely before moving. | |
| High Exhaust Temp (HEST) | AMBER | Exhaust temperature is elevated during regeneration or high load on the Volvo VT's aftertreatment system. | Avoid parking over flammable materials; operation is normal. |
24 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Oil Pressure Warning
Common causes
- Low oil level
- Oil pump failure
- Clogged oil filter
What to do
Stop engine immediately on your Volvo VT; check oil level and top off if needed. If light persists, have the oil system inspected.
Brake System Failure
Common causes
- Air leak in brake lines
- Compressor failure
- Low air pressure
What to do
Do not drive the Volvo VT. Check air pressure gauges; if below 75 psi, call for roadside assistance. Do not attempt to drive without proper brake pressure.
Coolant Overheating
Common causes
- Low coolant level
- Radiator blockage
- Failed thermostat or fan clutch
What to do
Stop engine and let cool on your Volvo VT; check coolant reservoir. Do not open hot radiator. Add coolant if low; if overheating continues, have cooling system serviced.
Charging System Failure
Common causes
- Alternator belt broken
- Faulty alternator
- Battery connection corrosion
What to do
Minimize electrical load and head to a service center; the Volvo VT's batteries will deplete quickly. Replace alternator or belt as needed.
DEF/AdBlue System Malfunction
Common causes
- Empty AdBlue tank
- Heater failure
- Quality sensor fault
What to do
Refill with certified AdBlue for your Volvo VT. If light stays on after refill, visit dealer for diagnostic; prolonged use will cause derating.
Frequently Asked Questions
What does the amber check engine light mean on my Volvo VT?
It indicates an emissions or performance fault; the Volvo VT will often enter a derate mode if severe. Have the diagnostic code read at a service center.
Why does my Volvo VT show 'High Exhaust Temp' while driving?
This is normal during active DPF regeneration, which raises exhaust temperature. Avoid parking near combustibles and continue driving until the cycle completes.
My parking brake light stays on even when released. What should I do?
Check if the spring brake is fully disengaged. If light persists on the Volvo VT, there may be a pressure switch fault – have it inspected.
What should I do if the air brake pressure light comes on?
Stop immediately if below 60 psi. Let the compressor build pressure; if light stays on, there is an air leak – do not drive the Volvo VT.
How often should I check the AdBlue level in my Volvo VT?
Monitor via the dashboard display; refill when low. The system will warn you, and if ignored, the truck will eventually derate.
Can I continue driving with the ABS light on?
Yes, but without anti-lock function – be cautious on slippery surfaces. Have the Volvo VT's ABS system checked soon.