What does an OBD fault in a car mean?

1 Answers
NaomiMarie
07/29/25 5:13pm
OBD stands for On-Board Diagnostics, a system that continuously monitors the engine's operating conditions and the working status of the exhaust after-treatment. It will immediately issue a warning if it detects any situation that may cause excessive emissions. Below is an introduction to the OBD system: 1. Full name of OBD: On-Board Diagnostics, which translates to Chinese as a detection system extended for automotive fault diagnosis. "OBDⅡ" is the abbreviation for "On-Board DiagnosticsⅡ", meaning Type II On-Board Diagnostics system. 2. To standardize the diagnosis of emissions and drivability-related faults, starting from 1996, all new cars sold in the U.S. must have similar diagnostic tools, fault codes, and repair procedures, i.e., comply with the OBDⅡ program regulations. 3. With the increasing globalization of the economy and the internationalization of automobiles, the OBDⅡ system, as the foundation for drivability and emissions diagnosis, will be implemented and applied more widely. The OBDⅡ program makes automotive fault diagnosis simple and uniform, eliminating the need for maintenance personnel to learn each manufacturer's new system separately.
Was this review help?
20
3
Share
More Forum Discussions

What are the body dimensions of the Dongfeng A9?

The Dongfeng A9 measures 5066 mm in length, 1858 mm in width, and 1470 mm in height, with a wheelbase of 2900 mm. The Dongfeng A9 is a mid-to-large-sized sedan. Compared to the Audi A6L, which is positioned as a luxury mid-to-large-sized sedan, although there is a certain gap in wheelbase, the body width and height are very close to the A6L, and the body length is even 51 mm longer than the A6L. Below is an introduction to the model: The Dongfeng A9 is equipped with a 1.8-liter turbocharged engine across the entire lineup. This engine has a maximum power of 150 kW, a maximum torque of 280 Nm, a maximum power speed of 5500 rpm, and a maximum torque speed ranging from 1400 to 4000 rpm. This engine features CVVT technology and direct fuel injection, and uses an aluminum alloy cylinder head and block. It is paired with a 6-speed automatic transmission. The Dongfeng A9 uses a MacPherson independent suspension at the front and a multi-link independent suspension at the rear.
10
2
Share

Does the Lynk & Co 03 Use a Volvo Engine?

The Lynk & Co 03's engine utilizes Volvo technology but does not directly use a Volvo engine. The Lynk & Co 03 is equipped with three different engines: a low-power version 1.5-liter turbocharged engine, a high-power version 1.5-liter turbocharged engine, and a 2.0-liter turbocharged engine. Below are detailed descriptions of the three engines in the Lynk & Co 03: 1. The low-power version 1.5-liter turbocharged engine delivers 156 horsepower and a maximum torque of 245 Nm. This engine reaches its maximum power at 5000 rpm and its maximum torque between 1450 to 4000 rpm. It features direct fuel injection technology and uses an aluminum alloy cylinder head and block. 2. The high-power version 1.5-liter turbocharged engine produces 180 horsepower and a maximum torque of 265 Nm. This engine achieves its maximum power at 5500 rpm and its maximum torque between 1500 to 4000 rpm. It also employs direct fuel injection technology and an aluminum alloy cylinder head and block. 3. The 2.0-liter turbocharged engine generates 190 horsepower and a maximum torque of 300 Nm. This engine reaches its maximum power at 4700 rpm and its maximum torque between 1400 to 4000 rpm.
7
1
Share

What are the reasons for the BYD F3 blower not working?

The reasons for the BYD F3 blower not working are: 1. Blower coil overheating: When the car is running the air conditioner for a long time under full load, the air conditioner blower will be overloaded, causing the coil to overheat. This is a normal phenomenon, and it will work normally after it stabilizes; 2. Poor contact of the connector: If the car frequently drives on bumpy roads, the blower connector may fall off due to vehicle vibration. In this case, simply reinstall it; 3. Fan jamming: If the blower or air filter is not cleaned for a long time, foreign objects such as sand, stones, or leaves may block it, causing the fan inside the blower to jam. As a result, the blower cannot work properly. In this case, simply clean the car's blower and air filter in time. It should be noted that the car's air filter should be replaced approximately every 10,000 kilometers. This car is 4533 mm long, 1705 mm wide, and 1490 mm high, with a wheelbase of 2600 mm. The BYD F3 uses a Mitsubishi 4G18 engine, paired with a 5-speed manual transmission.
8
4
Share

What are the length, width, and height of the Audi A4?

Body dimensions: The length, width, and height are 4851mm (Elegance model)/4858mm (Dynamic model), 1847mm, and 1439mm (comfort suspension)/1411mm (sport suspension), with a wheelbase of 2908mm. Here are the extended details: 1. The entire lineup is equipped with a 2.0L turbocharged engine paired with a longitudinal 7-speed Stronic dual-clutch transmission. 2. A 12V mild hybrid system is standard across all models. 3. In the 45TFSI quattro model, its 2.0L turbocharged engine is tuned for sporty performance, delivering a maximum power of 185kW and a maximum torque of 370Nm. Coupled with the quattro intelligent all-wheel-drive system, the 0-100km/h acceleration time is just 6.6 seconds. 4. In the 35TFSI and 40TFSI models, the 2.0L turbocharged engine is tuned for economy, with maximum power outputs of 110kW and 140kW, respectively. With the support of the 12V mild hybrid system, these models offer lower fuel consumption and superior economic performance.
4
0
Share

Do I Need to Replace the Entire Rear Axle If the Rear Axle Bushing Is Broken?

If the rear axle bushing is damaged but the axle itself is not deformed, and the bushing can be provided and replaced separately, then only the rear axle bushing needs to be replaced. If there is no separate bushing available, the entire rear axle assembly must be replaced. As long as the vehicle drives without issues, the rear axle bushing does not need replacement. A broken rear axle bushing will fail to provide shock absorption, leading to chassis vibrations and unusual noises. Severe vibrations can affect driving stability and reduce the comfort of the vehicle. Method for Replacing the Rear Axle Bushing: There are three fixing screws and one central screw. A 17-19 wrench is crucial for securing the rear axle. The brake fluid line is connected to the rear axle, and there is a fixing clip for the line. Use a hammer to slightly bend it for easier screw removal, but be careful not to break the fluid line. If it's your first time replacing the bushing, flatten the outer metal ring of the bushing by hammering it inward. Observe carefully—the bushing and rear axle should expose a small section of metal. Alternatively, use a sledgehammer with maximum force. If the metal gets deformed, smooth it with an angle grinder, then remove the bushing and repeat the installation process.
20
0
Share

What are the reasons why the trunk of a Chevrolet Cruze cannot be opened?

The trunk door of the Cruze is controlled by the remote. You need to press and hold the trunk unlock button to open it. The following are the reasons why it cannot be opened: 1. The trunk door lock switch is damaged. 2. Rainwater entering the trunk switch area causes corrosion, which has a relatively high failure rate. The only solution is to replace it. Solutions for a trunk that cannot be opened: 1. Issues with the linkage rod or lock cylinder. If you frequently use the key to open the trunk lid, it may be due to a broken linkage rod, and you should go to a repair shop to have it opened. If you always use the remote to open the trunk lid, it may be due to dust or rust in the lock cylinder. Spraying rust remover into the lock cylinder a few times can help open it. 2. The trunk is not unlocked. If the remote key is not used to unlock it, it will be difficult to open. Before opening, it's best to press the unlock button on the key or check if the key battery is dead. 3. Mechanical component failure, where the trunk itself has issues. 4. Generally, five-door cars cannot be opened from the inside. For example, some rugged off-road vehicles may not have an interior trunk switch to prevent accidental activation during driving, which could cause injuries or fatalities. Therefore, the trunk can only be opened from the outside.
10
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.