The Scania R620 is a heavy-duty semi truck equipped with a comprehensive instrument cluster that provides critical real-time data to the driver. The cluster features large analog gauges and a multi-information display, with warning lights designed for quick identification of vehicle status.
Scania R620 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | Appears in the Scania R620 when a severe fault, such as low oil pressure or brake failure, demands immediate stop. | Safely pull over as soon as possible, turn off the engine, and consult the fault code on the display. | |
| Check Engine (MIL) | AMBER | Illuminates in the R620 when the engine management system detects an emission-related fault or performance issue. | Have the engine diagnosed by a Scania workshop; continued driving may be possible if not flashing. | |
| Engine Oil Pressure | RED | Lights up in the R620 when oil pressure drops too low, risking severe engine damage. | Stop the engine immediately, check oil level, and do not restart until the issue is resolved. | |
| Battery / Charging | RED | Indicates a charging system failure in the R620, such as a faulty alternator or battery issue. | Check belt tension and battery connections; if not charging, seek service to avoid a breakdown. | |
| Coolant Temperature | RED | Warns that the R620's engine coolant is overheating, which can cause immediate engine damage. | Reduce engine load, stop when safe, and let the engine cool; check coolant level and fan operation. | |
| Brake System | RED | Signals a brake system fault in the R620, such as low air pressure or pad wear, compromising stopping ability. | Stop driving and inspect the air brake system; low air pressure requires waiting until pressure builds. | |
| ABS | AMBER | Indicates an antilock brake system malfunction in the R620; normal braking still works but ABS is disabled. | Drive carefully to a Scania dealer; avoid hard braking or slippery roads until repaired. | |
| Parking Brake | RED | Lights up when the parking brake is engaged on the R620, reminding the driver before moving off. | Release the parking brake fully before driving; if it stays on, check brake valve and air pressure. | |
| Tire Pressure (TPMS) | AMBER | Monitors tire pressure on the R620 and warns if a tire is significantly underinflated for safety and fuel economy. | Check tire pressures with a gauge and inflate to recommended values; inspect for punctures. | |
| Airbag (SRS) | AMBER | Indicates a fault in the supplemental restraint system of the R620; airbags may not deploy in a crash. | Have the SRS system inspected by a Scania workshop to ensure safety. | |
| Seat Belt | RED | Reminds the driver that the seat belt is not fastened in the R620, crucial for safety compliance. | Fasten your seat belt immediately; the light will go off once buckled. | |
| Glow Plug / Preheat | AMBER | Lights up in the R620 while the glow plugs are heating the engine for cold starts, and should go out when ready. | Wait for the light to extinguish before cranking the engine; if it stays on, have the system checked. | |
| DPF / Regeneration | AMBER | Indicates the diesel particulate filter is regenerating in the R620, or a fault if flashing; high exhaust temps possible. | If steady, continue driving to allow regeneration; if flashing, stop and follow manual instructions. | |
| DEF / AdBlue | AMBER | Warns that AdBlue level is low or quality is poor in the R620, affecting emissions compliance. | Top up AdBlue at the next opportunity; use only approved fluid to avoid system damage. | |
| Water in Fuel | AMBER | Detects water in the fuel filter of the R620, which can cause injection system damage if not drained. | Drain the water separator immediately or replace the fuel filter. | |
| Low Fuel | AMBER | Warns that fuel level is low in the R620's tank, typically with reserve remaining. | Refuel as soon as possible to avoid running out and causing air in the fuel system. | |
| High Beam | BLUE | Shows that the high beam headlights are switched on in the R620 for maximum road illumination. | Dim to low beam when approaching oncoming traffic to avoid dazzling others. | |
| Power Steering (EPS) | RED | Indicates a failure in the electric power steering system of the R620, making steering heavy. | Stop the vehicle as soon as safe; steering effort will increase significantly; seek repair. | |
| Engine / Exhaust Brake | AMBER | Lights up when the auxiliary braking system (retarder or exhaust brake) is active on the R620. | No action needed; it's normal when descending grades. If flashing, a fault may be present. | |
| Trailer | AMBER | Warns of a trailer connection issue on the R620, such as a lighting fault or ABS malfunction. | Check trailer electrical connectors and ABS sensors; repair before highway travel. | |
| Stability Control Off | AMBER | Indicates that the electronic stability program (ESP) is deactivated in the R620, reducing traction control. | Reactivate ESP if road conditions require stability assistance; avoid turning off unnecessarily. | |
| Door Open | RED | Shows that the driver's or passenger door is not fully closed on the R620, affecting cabin integrity. | Close all doors securely before driving; check for obstruction. | |
| High Exhaust Temp (HEST) | AMBER | Warns that exhaust temperature is high during DPF regeneration on the R620; avoid parking over combustibles. | Continue driving or park away from dry grass or flammable materials until the light goes out. | |
| Washer Fluid Low | AMBER | Indicates low windshield washer fluid level in the R620, essential for cleaning the windshield. | Refill the washer reservoir with appropriate fluid; check for leaks. |
24 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 hoses or radiator
- Thermostat stuck closed
- Failed cooling fan clutch
What to do
Stop the Scania R620 immediately and let the engine idle with the heater on to cool down. Check coolant level and fan belt; if no leak, have the cooling system pressure tested at a Scania workshop.
Brake Air Pressure Loss
Common causes
- Air brake system leak
- Compressor failure
- Drain valve stuck open
What to do
Do not drive the R620 with low air pressure. Wait for the air system to build pressure; if it fails, locate the leak using soapy water on connections and tighten or replace faulty components. Tow to a service center if needed.
Low Oil Pressure
Common causes
- Insufficient engine oil level
- Oil pump failure
- Bearing wear causing excessive clearance
What to do
Shut off the R620's engine immediately to prevent seizure. Check oil level and top up if low; if the light stays on, do not restart - have the oil pressure switch and pump inspected by a Scania dealer.
Transmission Overheating
Common causes
- Low transmission fluid
- Clogged cooler
- Excessive load or aggressive driving
What to do
Reduce engine load and shift to a lower gear on the Scania R620 to cool the transmission. Stop and let it idle in neutral; check fluid level and condition. If persists, have the transmission serviced.
Charging System Failure
Common causes
- Alternator belt broken
- Faulty alternator
- Battery terminal corrosion
What to do
Turn off all non-essential electrical loads in the R620 and drive to the nearest safe location. Check belt tension and battery connections; if the red battery light remains, alternator replacement is likely required.
Frequently Asked Questions
What does the red stop light mean on my Scania R620?
It indicates a critical fault that requires you to stop the vehicle as soon as safely possible, such as low oil pressure or brake failure.
Why is the check engine light on in my R620?
Usually due to an emission-related issue like a faulty sensor or DPF system; you can continue driving but should have it diagnosed soon at a Scania workshop.
How to turn off the DPF regeneration light?
During active regeneration, the light will remain on; let the process complete. If it flashes, there may be a fault requiring a forced regeneration by a technician.
What should I do if the AdBlue warning light comes on?
Refill the AdBlue tank with certified fluid. If the light stays on, the system may need resetting or a quality issue - visit a Scania dealer.
Is it safe to drive with the ABS light on?
Normal braking still works, but ABS is disabled. Drive cautiously, avoid hard stops, and have it repaired as soon as possible.
Why is the battery light on while driving?
The charging system is failing; check the alternator belt and connections. If it stays on, the battery may not be charging, leading to a breakdown.