How to solve the problem of diesel car OBD light on and lack of power?

1 Answers
VonCatherine
07/30/25 2:18am
First, connect the diagnostic computer to read the fault code or data stream. If there is a fault code, troubleshoot according to the fault code. The OBD light on in a diesel car indicates that the vehicle's exhaust emissions exceed the standard. If necessary, go to the 4S store as soon as possible for troubleshooting and repair based on the fault code. Replace the oxygen sensor. Replace with new parts to ensure the normal operation of the engine. Repair the three-way catalytic converter. This method is not only time-saving and labor-saving but also economical.
Was this review help?
2
1
Share
More Forum Discussions

What Causes a Diesel Vehicle to Indicate Water in the Fuel?

Diesel vehicle indicating water in the fuel is most likely caused by a damaged fuel filter, which requires inspection and replacement to resolve the issue. Below is relevant information about automotive fuel filters: Function: Almost all vehicles are equipped with a fuel filter, which filters out water and impurities from the fuel, ensuring that the fuel entering the engine is free of water. Maintenance: Fuel filters need to be regularly inspected or replaced for maintenance. Otherwise, they may fail to properly filter impurities and water from the fuel, directly affecting the engine's normal operation.
10
5
Share

What are the differences between Shandeka G7 and C7H?

Here are the specific differences between Shandeka G7 and C7H: Different positioning: The luxury version C7H, as the name suggests, is relatively more abundant in overall configuration and offers a better comfort experience. The G7 Classic version, on the other hand, is more practical and targeted at users with essential needs, making it more economical in positioning. Different appearance: The most obvious difference in appearance between Shandeka G7 and C7H is the color of the front grille emblem. The emblem on the C7H is gold, giving it a very luxurious feel, while the emblem on the G7 is silver, representing a classic look.
20
3
Share

Is It Normal for the Inner Side of Car Hubs to Rust?

It is normal for the inner side of car hubs to rust because they are made of metal materials. Long-term exposure to oxygen in the air leads to oxidation and rusting, which is a natural occurrence. Below is a detailed introduction to car hubs: Overview: The car hub is the central part of the wheel where the axle is mounted, commonly referred to as the "rim" or "steel wheel." Hubs are prone to accumulating dirt, and if not cleaned for a long time, they may corrode or deform, posing safety hazards. Therefore, special attention should be paid to hub maintenance. Classification: In the market, hubs can be categorized into steel hubs and alloy hubs based on material, each with its own advantages and disadvantages.
9
4
Share

Why does the fan keep running after parking?

The reasons why the fan keeps running after parking: 1. The car's fan has a cooling function. When the coolant temperature is too high after parking, the vehicle's computer will automatically calculate the fan's speed and duration. The higher the temperature, the longer the fan runs to protect the engine; 2. If the fan continues to run even after the engine temperature has dropped, it may be due to a loose circuit connection. You can try disconnecting the fan's wiring harness for a separate power-off treatment; 3. A faulty coolant temperature sensor or a stuck fan relay contact may require replacement at a repair shop. If the fan still runs after turning off the engine, check whether it's normal cooling or a malfunction.
15
1
Share

Can Motorcycles Use Highways in Hainan?

In Hainan, motorcycles are not allowed on highways due to local regulations that restrict highway access to automobiles only. Below is relevant information regarding motorcycles on highways: Regions prohibiting motorcycles on highways: Provinces and cities such as Henan, Shandong, Jiangsu, Fujian, Jiangxi, Sichuan, Chongqing, Ningxia, Hainan, Shanghai, Zhejiang, and Qinghai explicitly prohibit motorcycles on highways. Legal policies: Pedestrians, non-motor vehicles, tractors, wheeled special machinery vehicles, articulated buses, full-trailer towing vehicles, and other motor vehicles with a maximum design speed below 70 kilometers per hour are not permitted on highways. Where motorcycles are not prohibited, the main requirement is that the motorcycle's maximum speed meets the specified criteria.
6
4
Share

What Causes the Metallic Screeching Sound During Cold Start of a Prado?

The causes of metallic screeching sound during cold start of a Prado include: 1. Loose accessory belt, leading to increased load and belt noise when accelerating; 2. Carbon buildup in the throttle body, causing poor throttle response and dirty idle control valve/throttle plate; 3. Carbon-oil mixture accumulation in the engine intake tract, resulting in buzzing noise during sudden acceleration. Solutions: 1. Inspect generator/compressor/power steering pump belts for looseness and replace/tighten if needed; 2. Check throttle body contamination for cleaning and recalibration; 3. Clean intake tract oil-carbon mixture using specialized intake cleaner; 4. Inspect throttle pedal spring for looseness/fatigue and replace if necessary.
5
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.