Dashboard Lights: What Do They Mean?

Today, we will cover a topic of visual light indicators/signals found on a vehicle’s dashboard/binnacle to understand their functions and meaning.
Dashboard lights on a vehicle are indicators that relay important information about the health and status of various systems within the car.
These lights fall into several categories; 

1. Red – Warning
2. Yello/Amber – Caution Lights
3. Information/Status Lights
4. Green/Blue – Information/Status Lights
5. White/Gray – Advisory Lights
6. Security Lights

Apart from these standard indicators, modern technologies have used digital displays, voice alerts, and more to monitor car functions and alert processes.

General Dashboard Lights

In the main introduction above, we have seen several dashboard warning lights, but not all are found in every car. The most common ones found in most cars include; Tire Pressure light, ABS light, Low Oil Pressure light, Airbag/SRS light, Engine Temperature Warning light, Battery light, Brake light, and ESP light.

Tire Pressure Light

The tire pressure light is a caution light on the car’s dashboard that typically indicates that one or more of your tires is/are underinflated. When this light appears, you should check the tire pressures ASAP. Sometimes t

How to Reset Tire Pressure Light

Follow the below steps to reset the tire pressure light on your car, though the exact process can vary depending on the make and model of your vehicle.
The general steps are:

• Check Tire Pressure
  Ensure that tires are inflated to the manufacturer’s recommended pressure level usually found on the door frame or car manual.
• Start the Car
  Switch on the ignition or start the car depending on the vehicle brand.
• Locate the Tire Pressure Reset Button
  Most cars with TPMS have a reset button beneath the steering, in the glovebox, or on the dashboard. Locate it then press and hold it for a few seconds until the light goes off, then release.

Turn Off the Ignition and Restart
For cars that don’t have a reset button, turning the car off and then back on resets the system which could lead to the light going off once the system recognizes the correct tire pressures.

Why is my Tire Pressure Light Blinking

In some cases, the tire pressure light may blink instead of turning on or off. This could indicate several issues, such as low tire pressure, a dead battery, or faulty sensors.

ABS Light

How to Turn Off ABS Light

If the ABS light is illuminated on your dashboard, it indicates a problem with your ABS system.
To diagnose and potentially fix the issue, follow the below steps:

• Check for Error Codes
  Use an OBD-II scanner: Most ABS systems malfunctions trigger a code that can be read with an OBD-II scanner.
• Inspect the Wheel Speed Sensors
  Wheel speed sensors are part of the ABS system if they are damaged, dirty, or malfunctioning it may trigger the ABS light. Clean the sensors and check the wiring.
• Check the ABS Fuse
  If the system fuse is blown, the system won’t work and the light will turn on.

Check for damaged components
Inspect the ABS control module, pump, and valve. Any damage or faults in one of these parts could lead to an ABS failure.

Low Oil Pressure Light

When the Low Oil Pressure light comes on it could be one of many things in the engine oil supply system.
Common causes could be:

• Low Oil Pressure
  This is the most straightforward suspect. Check the oil level and refill if necessary
• Worn Oil Pump
  If the oil pump is failing, it might not be able to pump oil to the engine sufficiently due to low pressure.
• Dirty/Old Oil
  Old or contaminated oil can be too thick for oil circulation.
• Fault Oil Pressure Sending Unit
  The oil pressure sensor can sometimes malfunction due to loose connections or other reasons, giving a false low-pressure reading.

Airbag/SRS Light

When the Airbag/SRS light on the dash is illuminated, it indicates that there may be a problem with the airbag system. Common reasons for the Airbag/SRS light to come on include:

• Faulty airbag sensors
  Sensors detect collisions and trigger the airbags. If one of them fails, the system might not work as expected.
• Wiring issues
  A loose or damaged connection in any part of the airbag system can trigger the light. Check for connection issues under the seats or around the airbags.
• Seat belt issues
  The airbag system is interrelated with seat belts. Faulty seat belt sensors or connectors can trigger the SRS warning light.
• Defective clock spring
  The clock spring is a part connecting the airbag to the steering wheel. If it’s damaged, the airbag might not deploy during a crash.
• Faulty airbag module
  This is the controlling unit of the airbag system. If it fails, the system won’t operate correctly.

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How to Reset SRS Light

• Method 1: Using a Diagnostic Scanner (OBD-II Scanner)
  Use the scanner to check for any stored SRS-related codes. If you detect any, solve them, then use the scanner to clear the SRS codes and reset the light.
• Method 2: Disconnect the Battery (temporary method)
  Turn off the car, disconnect the battery, and then wait for 10 to 15 minutes to allow the system time to reset. Reconnect the battery, and start the car, if the light persists, then there may be a fault in the airbag system.

Engine Temperature Warning Light

The engine temperature warning light typically indicates that your engine is overheating or engine coolant temperature is too high. This can happen for different reasons, such as low coolant levels, a malfunctioning thermostat, a broken radiator, or a faulty water pump.
If it comes on it is advisable to pull over to a safe place, check the coolant level, check for leaks, and wait for at least half an hour for the pressure and temperature of the coolant system to drop before opening the hood for safety. If you can’t find what triggered the alert, seek mechanical assistance.

Battery Warning Light

When the battery warning light on your vehicle’s dash is illuminated it typically indicates an issue with the charging system. Primary suspects are the battery, alternator, or another component involved in the charging process. Below are the possible triggers of the warning light:

• Faulty Alternator
  If the alternator isn’t charging the battery properly, the battery warning light will appear. It could be due to a malfunctioning alternator or a broken belt.
• Battery Issues
  If your battery is worn out or has a low charge, the warning light may signal that it’s not holding a charge or being charged properly.
• Loose or Corroded Battery Connections
  Loose, dirty, or corroded connections between the battery and the alternator can prevent proper charging.
• Electrical Issues
  Wiring issues or broken fuses can also cause charging issues.

Brake Light

An illuminated brake light on the dashboard typically indicates an issue with the vehicle’s braking system. This could be due to a simple issue as an engaged parking brake to more complex issues on the vehicle braking system.

Why is My Brake Light On

Factors that can trigger the brake light include:

• Parking Brake Engaged
  When the parking brake is engaged, the brake light on the dash is activated. Ensure that the parking brake is fully released.
• Low Brake Fluid
  The brake light comes on when the brake fluid is below the desired level. Check the brake fluid reservoir and top it off if necessary.
• Worn Brake Pads
  Worn-down brake pads can trigger the brake light. Inspect the pads and replace them if necessary.
• Faulty Brake Light Sensor
  A malfunctioning sensor/switch in the braking system can trigger the dash brake light.
• Hydraulic System Problems
  Leakages, issues

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ESP Light

The ESP/ESC light is triggered when the car detects a loss of traction. The ESP light typically means there’s a malfunction in the system or it’s actively engaged. Driving on slippery road conditions or aggressively can also trigger the light. Other factors that may trigger the light are low tire pressure and faulty wheel speed sensors.

ESP BAS Light

The ESP BAS light is a light that comes on when there’s an issue with the Electronic Stability Control Program (ESP/ESC) or the Brake Assist System (BAS).
When this light comes on it could be due to a sensor malfunction, low brake fluid level, faulty wiring or connection, tire size discrepancies, faulty ABS module, or faulty brake light switch.

Final Verdict

Dash signal lights, or warning lights, play a crucial role in providing vital information about the health and status of your vehicle’s systems and components. These lights ensure that the vehicle operates safely and efficiently.

As mentioned earlier, these lights vary in severity, with color being a key indicator. Red warning lights signal critical issues, while green lights typically provide information or indicate the status of various functions. It’s essential to always pay attention to these signals, as they help maintain safety, prevent damage, ensure optimal performance, and offer added convenience for the driver.

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