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GPF-OPF MODULE functions types failures DTCs

8/3/2022

 
GPF/OPF modules are essential components in modern vehicles that are designed to reduce exhaust emissions. These modules work in conjunction with the engine and emission control system to trap and burn off harmful particles from the exhaust gas. In this article, we will discuss the functions, types, failures, and diagnostic trouble codes (DTCs) associated with GPF/OPF modules.

Functions of GPF/OPF Module
The primary function of GPF/OPF modules is to reduce particulate matter (PM) emissions from the exhaust gas. These modules work by trapping PM in a filter and then burning it off through a process called regeneration. During the regeneration process, the temperature of the exhaust gas is increased to burn off the trapped PM. This process ensures that the PM emissions are reduced to an acceptable level.
​

Types of GPF/OPF Module
There are two main types of GPF/OPF modules, passive and active. Passive GPF/OPF modules are designed to trap PM without any additional intervention from the engine or emission control system. These modules are commonly used in diesel engines and are made of materials such as ceramic, silicon carbide, and cordierite.
​

Active GPF/OPF modules, on the other hand, use an active regeneration process to burn off the trapped PM. This process is triggered by the engine control unit (ECU) and involves injecting additional fuel into the engine to increase the temperature of the exhaust gas. Active GPF/OPF modules are commonly used in gasoline engines and are made of materials such as metal fibers, sintered metal, and other metallic materials.
​

Failures of GPF/OPF Module
GPF/OPF modules are prone to failures due to several reasons. One of the most common causes of failure is a buildup of ash and soot in the filter. This buildup can restrict the flow of exhaust gas, leading to reduced engine performance and increased emissions.

Another common cause of failure is damage to the module's structure due to high temperatures or physical impacts. This damage can lead to cracks in the filter, which can result in leaks and increased emissions.

Diagnostic Trouble Codes (DTCs)
GPF/OPF modules are equipped with sensors that monitor the module's performance. If the module is not functioning correctly, the ECU will generate a DTC. Some of the most common DTCs associated with GPF/OPF modules include:
  • P2463 - Diesel Particulate Filter - Soot Accumulation
  • P2453 - Diesel Particulate Filter - Pressure Sensor A Circuit Range/Performance
  • P246B - Diesel Particulate Filter - Excessive Soot Accumulation
  • P246C - Diesel Particulate Filter - Soot Accumulation
  • P246F - Diesel Particulate Filter - Restriction - Ash Accumulation

GPF/OPF modules play a critical role in reducing exhaust emissions from modern vehicles. These modules work by trapping PM and burning it off through a regeneration process. There are two main types of GPF/OPF modules, passive and active, and they are prone to failures due to various reasons. If you encounter any issues with your GPF/OPF module, it is essential to address them promptly to prevent further damage and ensure that your vehicle meets emission standards.

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