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Understanding Truck Sensor Symbols: A Comprehensive Guide

LONG

12/02/2025

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Anh Tuan, a seasoned truck driver in Long Bien, Hanoi, often shares stories about the “magic eyes” on his Hyundai HD120S truck. Once, while driving on Highway 5B, his engine warning light suddenly illuminated. Thanks to his understanding of the dashboard symbols, he quickly diagnosed a problem with the engine oil pressure, pulled over for inspection, and averted a potential disaster. Anh Tuan’s experience sparked curiosity among fellow drivers about the meaning of sensor symbols in vehicles. Today, let’s decipher these mysterious icons with Xetaihanoi.edu.vn!

Vehicle Sensors: Your Vehicle’s Sixth Sense

Sensors in vehicles act as a “sixth sense,” collecting and transmitting vital information about various systems to the Engine Control Unit (ECU). This allows the ECU to make necessary adjustments, ensuring smooth operation, safety, and fuel efficiency.

Common Vehicle Sensor Symbols and Their Meanings

Numerous sensor symbols appear on the dashboard, especially in trucks. Here are some common ones and their interpretations:

1. Engine Sensors:

Crankshaft Position Sensor (CKP): Symbolized by a lightning bolt, it indicates the crankshaft’s position and speed, enabling the ECU to calculate precise fuel injection and ignition timing.
Camshaft Position Sensor (CMP): Represented by a gear, it determines the camshaft position, synchronizing the crankshaft and camshaft operation.
Oxygen Sensor (O2): Depicted as an “O” with two wavy lines, it measures oxygen levels in the exhaust, helping the ECU optimize the air-fuel ratio.
Engine Coolant Temperature Sensor (ECT): Shown as a thermometer in water, it monitors engine temperature, controlling the cooling fan and providing overheating alerts.

2. Brake System Sensors:

ABS Sensor: Symbolized by a circle with “ABS,” it monitors wheel speed, preventing wheel lockup during braking.
Brake Fluid Pressure Sensor: Represented by an oil can with an exclamation mark, it warns of low brake fluid pressure, ensuring effective braking.

3. Safety System Sensors:

Airbag Sensor: Illustrated by a person seated with a deployed airbag, it activates airbags during a collision. Airbag sensor on a truck dashboard
Tire Pressure Monitoring System (TPMS) Sensor: Depicted as a tire with an exclamation mark, it monitors tire pressure and alerts the driver to low pressure. Tire pressure sensor on a truck

4. Other Sensors:

Rain Sensor: Symbolized by a raindrop and a windshield wiper, it automatically activates wipers when it rains.
Light Sensor: Illustrated by a sun and a headlight, it automatically turns headlights on/off in low-light conditions.

Reference Table for Vehicle Sensor Prices (VNĐ)

Sensor Type	Price (VNĐ)
Crankshaft Position Sensor	500,000 – 1,500,000
Camshaft Position Sensor	300,000 – 1,000,000
Oxygen Sensor	1,000,000 – 3,000,000
Engine Coolant Temperature Sensor	200,000 – 500,000
ABS Sensor	800,000 – 2,000,000
Brake Fluid Pressure Sensor	300,000 – 800,000
Airbag Sensor	1,500,000 – 5,000,000
Tire Pressure Sensor	500,000 – 1,500,000
Rain Sensor	400,000 – 1,200,000
Light Sensor	300,000 – 800,000

Note: Sensor prices may vary depending on the vehicle make, model, and supplier.

Frequently Asked Questions About Vehicle Sensor Symbols

1. Does an illuminated check engine light always indicate a sensor problem?

The check engine light can illuminate for various reasons; a sensor issue is only one possibility. For accurate diagnosis, take your vehicle to a reputable garage for a diagnostic scan.

2. Where can I find reliable sensor replacement services in Hanoi?

Reputable garages in Cau Giay and Long Bien districts, or authorized dealerships for Hyundai, Hino, and Isuzu trucks offer reliable sensor replacement services.

3. What precautions should I take when replacing vehicle sensors?

Use genuine sensors compatible with your vehicle model. Sensor replacement should be performed by qualified technicians to avoid damaging other components.

4. Does truck feng shui relate to the sensor system?

While lacking scientific evidence, many truck drivers believe that maintaining a well-functioning sensor system contributes to the vehicle’s overall well-being and brings good luck on the road.