What is the purpose of the car OBD interface?

1 Answers
LeBarrett
07/30/25 4:24am
The car OBD interface is used to connect to a diagnostic computer. Modern vehicles have highly developed electronic and fault diagnosis systems. When a part of the vehicle malfunctions, the computer generates a fault code. These fault codes are not directly displayed on the dashboard; they can only be read by connecting a diagnostic computer to the OBD interface to identify which part is faulty. The OBD interface not only connects to diagnostic computers but can also connect to some external displays. Once connected, these external displays can read certain data, such as water temperature. The OBD interface is very important and is usually located near the driver's pedal area. When using the vehicle, be careful not to let dirt enter the OBD interface and avoid exposing it to water.
Was this review help?
7
3
Share
More Forum Discussions

Where is the license plate number Lu V from?

Lu V is the license plate number of Weifang City, Shandong Province. The relevant introduction of the license plate number is as follows: 1. The character length of the motor vehicle registration institution code is 2 digits, consisting of Chinese characters and English letters. The Chinese character is the abbreviation of the province, autonomous region, or municipality directly under the central government, and the English letter is the code of the vehicle management office. 2. The character length of the license plate number is 5 digits, ranging from 00001 to 99999. When the number exceeds 100,000, it is replaced by English letters such as A, B, C, etc. A represents 100,000, B represents 110,000, C represents 120,000, and the last letter Z represents 350,000.
3
1
Share

Do I Need a Wheel Alignment When Replacing Four New Tires?

Replacing tires does not require a wheel alignment. The reasons are as follows: 1. Changing the rims and tires only affects the overall wheel balance and has no impact on the suspension. 2. Replacing rims and tires only alters the wheel's properties, requiring a wheel balance check. A wheel alignment refers to the suspension's properties. As long as the tire and rim sizes remain consistent, a wheel alignment is unnecessary. 3. If one side of the tire is severely worn but the tire itself is fine, a wheel alignment may be needed. Additionally, if the car has been in an accident and the chassis or suspension is severely damaged, this can also affect the tires, making a wheel alignment advisable.
2
4
Share

Should a new car use 92 or 95 octane gasoline?

New cars require different octane levels depending on the model. Here are the specific guidelines: 1. There will be a sticker on the inside of the fuel tank cap indicating whether the model requires 92 or 95 octane. 2. If it says "recommended to use 92 octane or above," then both 92 and 95 octane can be used. However, it is important to stick to one octane level consistently and not switch between 92 and 95 over time. 3. If it says "recommended to use 95 octane or above," then 92 octane cannot be used, as using a lower octane than recommended may cause engine knocking and, over time, increase carbon buildup in the engine. 4. Some people believe that higher octane gasoline is better, providing stronger engine power and better cleaning effects. In reality, the octane rating only represents the proportion of octane in the gasoline. For example, 95 octane gasoline contains about 95% isooctane and 5% heptane. Since isooctane has better anti-knock properties and heptane has poorer anti-knock properties, a higher octane rating means better anti-knock performance.
10
0
Share

What does a Hubei license plate start with?

Hubei license plates start with the character 'E'. The vehicle registration authority code consists of 2 characters, comprising a Chinese character and an English letter. The Chinese character is the abbreviation of the province, autonomous region, or municipality directly under the central government, while the English letter represents the code of the vehicle management office. The license plate codes for various regions in Hubei Province are as follows: 1. 'E A' represents Wuhan City; 2. 'E B' represents Huangshi City; 3. 'E C' represents Shiyan City; 4. 'E D' represents Jingzhou City; 5. 'E E' represents Yichang City; 6. 'E G' represents Ezhou City; 7. 'E H' represents Jingmen City; 8. 'E J' represents Huanggang City; 9. 'E K' represents Xiaogan City; 10. 'E M' represents Xiantao City; 11. 'E N' represents Qianjiang City.
4
1
Share

What Causes the Continuous Buzzing Sound After Turning on the Car's Power?

The reasons for the abnormal buzzing or current sound after turning on the car's power are as follows: 1. It may be the sound of mechanical friction during movement; 2. Loose connections or lack of lubrication in friction parts; 3. There might also be a minor short circuit in the circuit, where the passage of current generates sparks and an accompanying "buzzing" sound due to discharge. Additional Information: 1. Current noise refers to the very weak electrical signals caused by the irregular thermal motion of electrons in components, amplified to produce a "sound." In audio playback, the "hissing" sound heard when turning up the volume is audio current (noise). 2. Current flowing through wires does not produce sound; even a steady DC current passing through a speaker will not generate sound. It is best to listen carefully to the source of the "buzzing" sound to eliminate potential short circuit hazards and avoid causing more significant issues.
10
2
Share

Can You Step on the Gas While Releasing the Clutch?

Driving allows you to release the clutch while stepping on the gas, but it's important to follow the correct procedure. When the clutch is fully depressed, you should first shift gears. As you gradually release the clutch to the point of semi-engagement and hold it steady, you can then continue to release the clutch while simultaneously pressing the accelerator. The clutch is a disengagement device between the car's engine and the transmission, enabling gear shifting through its separation and engagement. Here are some precautions when using the clutch: 1. While driving, avoid maintaining a semi-engaged state for extended periods, such as only releasing the clutch halfway while accelerating, as this can cause wear on the clutch. 2. The clutch disc should be inspected approximately every 20,000 kilometers of vehicle use.
10
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.