The Volvo Trucks VHD instrument cluster is a vocational workhorse, designed for severe-duty applications like dump and concrete mixer trucks. Its gauges and warning lights provide critical feedback for on-highway and off-road operations, with features specific to the VHD's robust powertrain and hydraulic systems.
Volvo Trucks VHD Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | This red indicator signals a critical system failure requiring immediate engine shutdown to prevent damage, such as loss of oil pressure or overheating. | Safely pull over and stop the engine; consult the display for the specific fault code. | |
| Master Caution | AMBER | An amber caution light alerts you to a non-critical system issue that needs attention soon, like a DEF level drop or a failing sensor. | Check the driver information display (DID) for the specific alert and schedule service accordingly. | |
| Check Engine (MIL) | AMBER | This light indicates an engine emission or performance fault detected by the ECM, often triggered by sensor readings or DPF issues. | Reduce engine load and have the fault codes read at the next service stop; avoid continuous high-load operation. | |
| Engine Oil Pressure | RED | Low engine oil pressure has been detected, which can cause severe engine wear in the VHD's heavy-duty D13 engine. | Immediately shut down the engine and check oil level; do not restart until pressure is restored. | |
| Battery / Charging | RED | The battery is not being charged properly, likely due to a failed alternator or loose belt, risking electrical system failure. | Stop the engine and inspect alternator drive belt and connections; if belt is fine, replace alternator. | |
| Coolant Temperature | RED | Engine coolant temperature has exceeded safe limits, risking overheating and engine damage in the VHD's tough operating conditions. | Reduce engine load and let engine idle; if persists, shut down and check coolant level and fan operation. | |
| Transmission Temp | AMBER | The automatic transmission fluid temperature is high due to heavy load or continuous stop-and-go operation, common in vocational use. | Shift to a lower gear to reduce torque converter slip; if light stays on, stop and idle in neutral to cool down. | |
| Brake System | RED | A fault in the service brake system, such as low air pressure or brake pad wear, has been detected. | Stop immediately and check air brake pressure gauges; do not drive until pressure is restored and system inspected. | |
| ABS | AMBER | The Anti-lock Braking System has a malfunction, which could affect stability during hard braking, especially on slippery surfaces. | Service the ABS system at the earliest opportunity; standard braking remains functional but with reduced control. | |
| Parking Brake | RED | The parking brake is engaged or there is a fault in the system; this light should be off when brake is released. | Verify the parking brake valve position; if light stays on with brake released, have the system inspected for air leaks. | |
| Tire Pressure (TPMS) | AMBER | One or more tires have low pressure, which can cause uneven wear and reduce fuel efficiency on the VHD. | Check all tire pressures and inflate to recommended PSI; inspect for punctures if pressure drops repeatedly. | |
| High Beam | BLUE | The high-beam headlights are illuminated, providing extra visibility on dark roads but must be dimmed for oncoming traffic. | Switch to low beams when approaching other vehicles to avoid glare. | |
| DEF / AdBlue | AMBER | Diesel Exhaust Fluid level is low or the SCR system has a fault, which can lead to reduced engine power over time. | Top up DEF at a pump or with a jug; if light persists, check for SCR system faults at the dealer. | |
| Water in Fuel | AMBER | Water has been detected in the fuel filter/water separator, which can cause injector damage in the D13 engine. | Drain the water separator (located on the fuel filter) immediately; replace filter if contaminated. | |
| Glow Plug / Preheat | AMBER | The engine preheat system is active (in cold weather) or a glow plug fault exists, affecting cold starts. | Wait for the light to turn off before cranking; if it flashes, have glow plugs tested. | |
| DPF / Regeneration | AMBER | The diesel particulate filter needs active regeneration to clear soot buildup; the system may require a parked regen. | If possible, drive at highway speeds to allow passive regen; if light stays on, perform a parked regen per manual. | |
| Air Brake Pressure (Low) | RED | Air brake system pressure has dropped below 60 psi, which can cause brake failure in the VHD's heavy loads. | Stop immediately and let engine run to build air pressure; inspect for leaks if pressure doesn't recover. | |
| Engine / Exhaust Brake | GREEN | The engine brake (exhaust brake) is activated, assisting in slowing the vehicle without using service brakes. | Use on downgrades to reduce brake wear; deactivate on slippery roads to maintain control. | |
| Trailer | AMBER | A trailer electrical connection fault or ABS problem has been detected, affecting lighting or braking. | Check trailer plug and wiring; ensure trailer ABS is functioning if equipped. |
19 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheat (Coolant Temp Red)
Common causes
- Coolant leak in VHD's heavy-duty cooling system
- Failed cooling fan or fan clutch
- Blocked radiator from debris in off-road operations
What to do
Shut down engine immediately; after cooldown, check coolant level and inspect hoses. For the VHD, ensure the radiator is clear of mud or construction debris, and test the hydraulic fan drive if equipped.
Low Engine Oil Pressure
Common causes
- Low oil level due to consumption in high-load D13 engine
- Oil pump failure or worn bearings
- Clogged oil filter from extended service intervals
What to do
Stop engine and check dipstick; add recommended 15W-40 oil if low. If pressure remains low, do not restart—tow to a Volvo dealer for oil pump inspection.
Brake System Failure
Common causes
- Air leak in brake lines from vibration on rough terrain
- Worn brake pads or drum overstroke
- Low air pressure due to failed compressor
What to do
Park and apply parking brake; check air pressure gauges. For the VHD, examine air lines near suspension and dump body pivots for chafing; schedule brake service immediately.
Overheating Transmission
Common causes
- Continuous heavy hauling with torque converter in gear
- Low transmission fluid level from leak
- Restricted transmission cooler due to mud packing
What to do
Shift to neutral and idle to cool; check fluid level (I-Shift or manual). For VHD vocational use, clean the cooler fins with compressed air and inspect for leaks at cooler lines.
Charging System Failure
Common causes
- Alternator belt snapped from engine vibration
- Internal alternator regulator failure
- Corroded battery terminals from exposure
What to do
Shut down engine and check belt condition; if broken, replace. For the VHD, batteries are exposed to elements—clean terminals and test charging voltage at idle (should be 14V+).
Frequently Asked Questions
Why does my VHD's check engine light come on after regenerating?
The DPF regeneration can cause temporary high exhaust temps; if the light stays on, there may be a sensor fault or soot load issue. Have the ECM fault codes read at a Volvo dealership.
How often should I drain the water separator on my VHD?
Drain it daily during cold weather or when the 'Water in Fuel' light comes on. The VHD's separator is under the hood on the driver side; turn the drain valve until clear fuel appears.
Can I drive with the ABS light on in my VHD?
Yes, but only cautiously—standard braking still works, but you lose anti-lock function. On slippery roads or under heavy loads, this can increase stopping distance. Service ASAP.
What does the amber 'DPF Regen' light mean while idling?
It indicates the filter is soot-loaded and needs a parked regeneration. Park the VHD in a well-ventilated area, engage the parking brake, press the regen button (if equipped) and let the engine rev automatically for 20-30 minutes.
My VHD's air brake pressure light comes on after starting—is this normal?
The compressor takes time to build pressure; if it stays on after 2 minutes, there is a leak. Check air lines and gladhands; for the VHD, common leak points are the dump body control valves.
How do I reset the service hour meter on the VHD?
The hour meter resets automatically after scheduled maintenance is performed. Your Volvo dealer can reset it using software. Do not attempt manual reset; it tracks engine hour intervals.