When diagnosing and troubleshooting GMC vehicles, it’s important to understand the code P205B. This code is associated with the “Reductant Tank Temperature Sensor Performance” and can be difficult to diagnose. It is important to know the causes and solutions to address this issue properly. To assist, this article will provide a detailed summary of the GMC Code P205B, along with causes and solutions to help diagnose and repair the issue.
Causes and Solutions for GMC Code P205B
| Causes | Solutions |
|---|---|
| The ECM receives a serial data message from the reductant sensor module that the reductant temperature is not within -35 to +35°C (-31 to +95°F) of the ambient air temperature for greater than 3 s. | Check the reductant temperature and adjust if needed. |
| The ECM receives a serial data message from the reductant sensor module that the reductant temperature is not within -55 to +155°C (-67 to +311°F) for greater than 3 s. | Adjust the reductant temperature to the proper levels. |
| The difference between the coldest and warmest should be less than 7°C (45°F). | Check the coldest and warmest temperatures and adjust if needed. |
| The engine speed is greater than 600 RPM. | Adjust the engine speed if it is too high. |
Check the Reductant Temperature and Adjust if Needed
When diagnosing the GMC Code P205B, it is important to check the reductant temperature and adjust it if needed. This code is associated with the “Reductant Tank Temperature Sensor Performance” and can be difficult to diagnose. The ECM receives a serial data message from the reductant sensor module that the reductant temperature is not within -35 to +35°C (-31 to +95°F) of the ambient air temperature for greater than 3 s. If so, the reductant temperature must be adjusted to the proper levels.
Check the Coldest and Warmest Temperatures and Adjust if Needed
It is also important to check the coldest and warmest temperatures and adjust if needed. The difference between the coldest and warmest should be less than 7°C (45°F). If the coldest and warmest temperatures are not within this range, the reductant temperature must be adjusted to the proper levels.
Adjust the Engine Speed if it is Too High
Finally, it is important to adjust the engine speed if it is too high. The ECM receives a serial data message from the reductant sensor module that the engine speed exceeds 600 RPM. If so, the engine speed must be adjusted to the proper levels.
Conclusion
The GMC Code P205B is associated with the “Reductant Tank Temperature Sensor Performance” and can be difficult to diagnose. However, by understanding the causes and solutions of GMC Code P205B, it is possible to properly diagnose and repair the issue.
The causes of GMC Code P205B include the ECM receiving a serial data message from the reductant sensor module that the reductant temperature is not within -35 to +35°C (-31 to +95°F) of the ambient air temperature for greater than 3 s, the ECM receiving a serial data message from the reductant sensor module that the reductant temperature is not within -55 to +155°C (-67 to +311°F) for greater than 3 s, the difference between the coldest and warmest being greater than 7°C (45°F), and the engine speed being greater than 600 RPM.
The solutions to GMC Code P205B include checking the reductant temperature and adjusting if needed, checking the coldest and warmest temperatures and adjusting if needed, and adjusting the engine speed if it is too high.
Following these steps makes it possible to diagnose and repair GMC Code P205B properly.