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The OBD detection on the new car failed, but the scene was very embarrassing. Don't panic. The problem is actually not large.

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The OBD detection on the new car is not enough, and the scene was very embarrassing. Don't panic, the problem is actually small
2019/12/24 10:26:41 Source: Mixer manufacturer

Recently, I heard a lot of feedback from card users, but it turned out that the OBD detection on the license plate of the new car did not pass.

After further detailed understanding, originally from November 1, 2019, local vehicle administrations began to implement the new standards GB18285-2018 "Petrol Vehicle Pollutant Emission Limits and Measurement Methods (Dual Idle Method and Simple Working Condition Method)" and GB3847 -2018 "Diesel Vehicle Pollutant Emission Limits and Measurement Methods (Free Acceleration Method and Loading Deceleration Method)", which newly added OBD testing items. 搅拌车图片

A similar situation has appeared in the mainstream brands of commercial vehicles on the market, and even National Six vehicles will be like this, which is universal. Therefore, when a new car is licensed recently, if the OBD detection fails, don't worry, let's understand what the OBD is and why the OBD detection does not pass.

OBD (On-Board Diagnostics), the full name is "on-board automatic diagnostic system", this system can monitor the car's exhaust at any time from the engine's running status.

In case of exceeding the standard or failure, a warning will be issued, and the failure information will be stored in the trip computer. Later, you can use an external device to connect to the OBD interface and read out the error code and other information through a software program.


The OBD inspection of the vehicle management station is to use the OBD diagnostic instrument to read the vehicle OBD fault information and related data information to determine whether the vehicle test is qualified.

For the recent unsuccessful OBD testing of new car license plates, there are mainly the following situations:

1. The communication is unsuccessful or cannot be connected.

It is possible that the OBD diagnostic instrument of the test line of the vehicle management does not support the communication protocol used by the vehicle ECU system. According to the requirements of the regulations, the instrument equipped with the test line supports at least 5 communication protocols and has the ability to automatically check and match. In addition, the communication protocol used by the motor vehicle ECU system must also be within the scope of regulatory requirements.

Now that there is a problem with the matching of the two, it is necessary to contact the 4S store to upgrade the ECU system or the program of the testing equipment of the vehicle management department.

Second, there is a failure code to determine that it is unqualified.

The function of OBD itself determines that even new cars have historical fault codes. In addition, there are many types of fault codes. Some are non-emission related fault codes (such as electrical systems, safety systems), pending fault codes, and after repair. The remaining confirmation fault codes, etc., are not determined according to the requirements of OBD detection.

In this case, you can communicate the detection line to make a more accurate judgment on the part or contact the 4S shop to flash the machine to clear the historical fault code.


3. The ready state is not satisfied and the judgment is unqualified.

According to legal requirements, during the OBD inspection of new vehicle registration, the vehicle ready status is not required. The satisfaction of the vehicle ready status is generally only reflected after the vehicle is running at high speed.

If this happens, the communication detection line will make a more accurate judgment, or it will be detected after driving at high speed.

For our card friends, the above-mentioned problems in the license plate of the new car are all solved by the manufacturer's 4S shop, so don't worry. The above problems are mainly the matching of interface communication protocols and understanding of law enforcement standards. After all, for new things, a familiar process is also needed.


However, it is worthy of our card friends' attention that the new OBD test project is now added. On the one hand, the information passed is that the inspection of motor vehicles will be more stringent in the future. No longer is it okay not to be found on the spot, but will be recorded by the system.

Because it is judged by computer data, the influence of human factors is ruled out to the greatest extent. Old cars with unqualified exhaust gas will be difficult to cheat.


From the introduction above, we can know that due to the recent implementation of new standards for vehicle management inspections, new OBD testing items have been added, and there have been many OBD tests during the registration of new cars.

There are several situations such as unsuccessful communication, existence of fault codes, and unsatisfactory ready status, but these are not too big problems, either through software upgrades or enhanced communication processing.

For our card friends, we are cautioned that during the use of the vehicle, we must pay more attention to the maintenance of the vehicle, and add regular fuels, such as diesel, engine oil, urea, coolant, etc .; use the original air filter, diesel filter, Filter components such as oil filter elements, and are replaced regularly. Otherwise, troubles will easily occur in the annual vehicle review.

Recently, I heard a lot of feedback from card users, but it turned out that the OBD detection on the license plate of the new car did not pass.

After further detailed understanding, originally from November 1, 2019, local vehicle administrations began to implement the new standards GB18285-2018 "Petrol Vehicle Pollutant Emission Limits and Measurement Methods (Dual Idle Method and Simple Working Condition Method)" and GB3847 -2018 "Diesel Vehicle Pollutant Emission Limits and Measurement Methods (Free Acceleration Method and Loading Deceleration Method)", which newly added OBD testing items. 搅拌车图片

A similar situation has appeared in the mainstream brands of commercial vehicles on the market, and even National Six vehicles will be like this, which is universal. Therefore, when a new car is licensed recently, if the OBD detection fails, don't worry, let's understand what the OBD is and why the OBD detection does not pass.

OBD (On-Board Diagnostics), the full name is "on-board automatic diagnostic system", this system can monitor the car's exhaust at any time from the engine's running status.

In case of exceeding the standard or failure, a warning will be issued, and the failure information will be stored in the trip computer. Later, you can use an external device to connect to the OBD interface and read out the error code and other information through a software program.


The OBD inspection of the vehicle management station is to use the OBD diagnostic instrument to read the vehicle OBD fault information and related data information to determine whether the vehicle test is qualified.

For the recent unsuccessful OBD testing of new car license plates, there are mainly the following situations:

1. The communication is unsuccessful or cannot be connected.

It is possible that the OBD diagnostic instrument of the test line of the vehicle management does not support the communication protocol used by the vehicle ECU system. According to the requirements of the regulations, the instrument equipped with the test line supports at least 5 communication protocols and has the ability to automatically check and match. In addition, the communication protocol used by the motor vehicle ECU system must also be within the scope of regulatory requirements.

Now that there is a problem with the matching of the two, it is necessary to contact the 4S store to upgrade the ECU system or the program of the testing equipment of the vehicle management department.

Second, there is a failure code to determine that it is unqualified.

The function of OBD itself determines that even new cars have historical fault codes. In addition, there are many types of fault codes. Some are non-emission related fault codes (such as electrical systems, safety systems), pending fault codes, and after repair. The remaining confirmation fault codes, etc., are not determined according to the requirements of OBD detection.

In this case, you can communicate the detection line to make a more accurate judgment on the part or contact the 4S shop to flash the machine to clear the historical fault code.


3. The ready state is not satisfied and the judgment is unqualified.

According to legal requirements, during the OBD inspection of new vehicle registration, the vehicle ready status is not required. The satisfaction of the vehicle ready status is generally only reflected after the vehicle is running at high speed.

If this happens, the communication detection line will make a more accurate judgment, or it will be detected after driving at high speed.

For our card friends, the above-mentioned problems in the license plate of the new car are all solved by the manufacturer's 4S shop, so don't worry. The above problems are mainly the matching of interface communication protocols and understanding of law enforcement standards. After all, for new things, a familiar process is also needed.


However, it is worthy of our card friends' attention that the new OBD test project is now added. On the one hand, the information passed is that the inspection of motor vehicles will be more stringent in the future. No longer is it okay not to be found on the spot, but will be recorded by the system.

Because it is judged by computer data, the influence of human factors is ruled out to the greatest extent. Old cars with unqualified exhaust gas will be difficult to cheat.


From the introduction above, we can know that due to the recent implementation of new standards for vehicle management inspections, new OBD testing items have been added, and there have been many OBD tests during the registration of new cars.

There are several situations such as unsuccessful communication, existence of fault codes, and unsatisfactory ready status, but these are not too big problems, either through software upgrades or enhanced communication processing.

For our card friends, we are cautioned that during the use of the vehicle, we must pay more attention to the maintenance of the vehicle, and add regular fuels, such as diesel, engine oil, urea, coolant, etc .; use the original air filter, diesel filter, Filter components such as oil filter elements, and are replaced regularly. Otherwise, troubles will easily occur in the annual vehicle review.

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