What is OBD-II Code P244F – Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2

What is OBD-II Code P244F – Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2

In today’s age, vehicles are getting smarter and more complex with the advancement of technology. Modern vehicles come equipped with an On-board diagnostic system, commonly referred to as OBD. Mechanics use OBD diagnostic codes to identify the source of a problem in case of a malfunction with a car’s system. One of the common OBD codes encountered is P244F – exhaust temperature too high for particulate filter regeneration bank 2. In this article, we will explain the meaning of this code and how it can be repaired.

Understanding P244F Code

P244F OBD code is related to the exhaust system particulate filter. The particulate filter is a component of the exhaust system that removes harmful pollutants and particulate matter from exhaust gases. It is a crucial component for clean emission and car function.

The P244F code indicates that the temperature of the exhaust has exceeded the maximum limit for the particulate filter regeneration to take place. It occurs when a diesel’s particulate filter regeneration doesn’t happen correctly. The main function of diesel particulate filter regeneration is to increase the after-treatment exhaust system temperature to the point where diesel particulate filter soot accumulated inside the diesel particulate filter is combusted and cleared out of the system. It is a necessary process to keep the particulate filter clean.

When the P244F OBD code is detected, the car’s system goes into safe mode, reducing power to prevent damage to the engine caused by the excessive temperature buildup.

Repairing P244F Code

When the P244F OBD code is detected, the first step is to diagnose the issue. The diagnosis process typically involves inspection of the complete exhaust system, as well as sensor checks and comparing data readings with manufacturer’s specifications. Additionally, some common areas that should be checked for failures include the diesel particulate filter itself.

The fix for the P244F code may vary from one vehicle to another. Sometimes, resetting the system might help, but it’s not always a permanent solution. In most cases, a professional diagnosis is crucial to understanding the cause before attempting a resolution. Several elements can contribute to a high exhaust temperature, including the quality of fuel being fed to the engine, exhaust backpressure, and the engine’s combustion process.

Some of the common fixes for the P244F code include:

1. Replacing failed sensors – Faulty sensors, such as the differential pressure sensor or exhaust gas temperature sensor, can trigger the P244F code. Replacing the failed sensor should do the trick.

2. Cleaning the particulate filter – In most cases, high soot buildup inside the particulate filter can cause the P244F code to appear. At times, a professional filter cleaning can get it back to optimal performance.

3. Replacing the particulate filter – Sometimes, soot buildup due to an engine fault beyond the particulate filter cleaning protocol may lead to a damaged or impaired particulate filter. This requires the replacement of the particulate filter may be necessary to resolve the issue.

4. Addressing engine performance – Engine performance can sometimes cause the P244F code to appear, so it is important to take a comprehensive approach to the repair. This requires the engine faults being fixed and the system cleared and reset to see if the fault remains.

Frequently Asked Questions (FAQs)

1. Can a P244F code be triggered by a fuel system failure?
Yes, a fuel system failure can trigger the P244F code. The diesel particulate filter cleaning process is not sufficient if the fuel supplied is of low quality, and it can lead to high soot accumulation leading to a P244F code.

2. Can a P244F code be ignored?
No, the P244F code should not be ignored. Its failure to resolve can create engine damage and increase emissions beyond statutory limits. Ignoring it for too long can lead to costly repairs or even the replacement of the vehicle.

3. Why does the diesel particulate filter need regeneration?
The diesel particulate filter captures particulate matter to meet the emission standard. The regeneration process ensures that collected particulate matter is burned off. Proper regeneration ensures the filter’s efficiency and a healthy driving experience.

4. Can a DIY approach fix the P244F code?
It is not advisable to take the DIY approach in resolving the P244F code. Multiple causes exist when the code appears, and it requires professional expertise to identify the root cause and repair the problem.

5. How often does the DPF regeneration process occur?
The diesel particulate filter regeneration process occurs around every 400-500 miles, but it can vary depending on driving style and conditions.


In conclusion, a P244F code can cause severe engine damage and should not be ignored. Once the code appears, it’s crucial to have it diagnosed by a professional before any repairs are attempted. By understanding the common process of repairing the P244F code, car owners can save themselves time and expense by seeking prompt resolution of the problem. In case you experience this issue, consult a trusted mechanic to help diagnose the cause and provide appropriate solutions.





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