Warning lights on a truck dashboard indicate when there is a fault, warning or active function. Some lights only provide information to the driver, while others indicate that immediate action is required to prevent damage to the truck or dangerous situations.
In this blog, we explain the meaning of the most common dashboard warning lights and what you should do when they illuminate.
Red dashboard warning lights usually require immediate attention. When a red warning light comes on, it is advisable to stop safely as soon as possible and check the cause.
The oil warning light indicates that the oil pressure is too low or that there is a problem with the engine lubrication system. This warning light should never be ignored because insufficient lubrication can cause serious engine damage within a short period of time.
Common causes include:
If the oil warning light comes on, it is advisable to check the oil level immediately and prevent further damage.
This warning light indicates that there is a problem within the truck’s braking system. Because the brakes have a direct impact on road safety, any fault should always be taken seriously.
Possible causes include:
Have the braking system inspected as soon as possible before continuing your journey.
When this light comes on, the engine temperature has become too high. Continuing to drive may result in severe engine damage.
Common causes include:
Stop at a safe location as soon as possible and allow the engine to cool down.
The battery warning light indicates that the battery is not being charged properly. As a result, electronic systems may fail and there is a risk that the truck will eventually come to a stop.
This can be caused by:
Have the charging system checked if this warning light remains illuminated.
Trucks use air pressure for their braking systems. When the air pressure becomes too low, a red warning light will often appear on the dashboard.
Insufficient air pressure can reduce braking performance. For this reason, this warning light should never be ignored.
Yellow or orange warning lights usually indicate a fault or a maintenance issue. In many cases you can continue driving, but the problem should still be investigated.
The engine management warning light indicates that the engine management system has detected a fault.
Common causes include:
Although the truck will often continue to operate, it is advisable to have the fault code read as soon as possible.
The AdBlue warning light indicates that the AdBlue level is low or that there is a fault within the SCR system.
Possible causes include:
If the issue is not resolved, engine power may be limited.
This warning light indicates that the diesel particulate filter is becoming saturated with soot particles.
This is often caused by:
In many cases, a regeneration cycle can resolve the issue.
ABS stands for Anti-lock Braking System. When this warning light comes on, the system may no longer be functioning correctly.
Normal braking performance is usually maintained, but safety may be reduced during emergency braking or on slippery road surfaces.
The Electronic Braking System supports the operation of the brakes. A fault within this system can affect the truck’s braking performance.
For this reason, an EBS fault should be checked as soon as possible.
When this warning light comes on, there may be a fault within the retarder.
As a result, additional braking capacity may be reduced, which is particularly noticeable during long downhill descents.
Green and blue dashboard lights usually indicate that a function is active. These lights generally do not indicate a fault.
The blue high beam indicator light shows that the high beam headlights are switched on.
This light indicates that cruise control is active and that the selected speed is being maintained automatically.
PTO stands for Power Take-Off. When this light is illuminated, an external drive is being used for equipment such as a crane, compressor or hydraulic system.
The fog light indicator shows that the fog lights are switched on.
The turn signals are displayed on the dashboard when the driver activates the indicators.
When a dashboard warning light comes on, it is important to remain calm and assess the situation correctly.
Follow these steps:
Responding quickly can often help prevent costly repairs.
Not every warning light requires immediate action. However, some faults can cause serious damage if you continue driving.
Stop safely as soon as possible if any of the following warning lights appear:
Continuing to drive with these faults may lead to expensive repairs, dangerous situations or complete vehicle breakdown.
The warning lights on a truck dashboard help drivers identify faults and technical issues at an early stage. By understanding the meaning of the various warning lights, you can respond more quickly and often prevent more serious damage.
In summary:
A good understanding of dashboard warning lights not only improves road safety but also helps prevent unexpected downtime and costly repairs.
Do you have questions after reading this blog? We are happy to help you. Contact us by phone or start a chat.
Contact us
